-
generalized tonic-clonic seizure (pathology)
Generalized tonic-clonic seizures, sometimes referred to by the older term grand mal, are commonly known as convulsions. A person undergoing a convulsion loses consciousness and falls to the ground. The fall is sometimes preceded by a shrill scream caused by forcible expiration of air as the respiratory and laryngeal muscles suddenly contract. After the fall, the body stiffens because of......
-
generalized velocity (physics)
...may be reduced to a smaller number of independent generalized coordinates (written symbolically as q1, q2, . . . qi, . . . ) and generalized velocities (written as q̇1, q̇2, . . . q̇i, . . . ), just as, for the rigid body, 3N coordinates were......
-
Generall Historie of the Turkes, from the first beginning of that Nation (work by Knolles)
His Generall Historie of the Turkes, from the first beginning of that Nation appeared in 1603 after 12 years of labour. One of the earliest discussions in English of Turkey, the work became popular and appeared in numerous editions throughout the 17th century. Knolles’s prose was admired by Samuel Johnson and Lord Byron, and his book was used as the basis of a play by Nicholas Rowe i...
-
Generall Historie of Virginia, New England, and the Summer Isles, The (work by Smith)
...his books are A Description of New England (1616), a counterpart to his Map of Virginia with a Description of the Country (1612); The Generall Historie of Virginia, New England, and the Summer Isles (1624); and The True Travels, Adventures, and Observations of Captain John Smith in Europe, Asia, Africa,...
-
Generall rehearsall of warres (work by Churchyard)
...Ireland, the Low Countries, and France under various banners. Later, at court, he devised pageants for Queen Elizabeth’s progresses to Bristol (1574) and Norwich (1578), but a passage in his Generall rehearsall of warres (1579) offended Elizabeth, and Churchyard fled to Scotland. He was restored to favour about 1584 and received a small pension in 1593....
-
generally accepted accounting principles
...is obtained from the International Accounting Standards Board (IASB), an independent standard-setting organization based in the United Kingdom. In the United States the principles are embodied in generally accepted accounting principles (GAAP), which represent partly the consensus of experts and partly the work of the Financial Accounting Standards Board (FASB), a private body. Within the......
-
Generally Recognized As Safe (American food policy)
...before it may be used in food products. To suppress yeast and mold growth in foods, a number of chemical preservatives are permitted. In the United States, the list of such chemicals, known as GRAS (Generally Recognized as Safe), includes compounds such as benzoic acid, sodium benzoate, propionic acid, sorbic acid, and sodium diacetate....
-
generate-and-test method (psychology)
Often the least systematic of the problem-solving heuristics, the generate-and-test method involves generating alternative courses of action, often in a random fashion, and then determining for each course whether it will solve the problem. In plotting the route from New York City to Boston, one might generate a possible route and see whether it can get one expeditiously from New York to......
-
generating function (mathematics)
...constructed of a sum of products of the type fnxn, the convergence of which is assumed in the neighbourhood of the origin, is called the generating function of fn (see 7)....
-
Generation, A (film by Wajda)
...then film directing at the Leon Schiller State Theatre and Film School at Łódź. His first three films, Pokolenie (1954; A Generation), Kanał (1957; Canal), and Popiół i diament (1958; Ashes and......
-
“Generation of Animals” (work by Aristotle)
...later known, misleadingly, as The History of Animals, to which Aristotle added two short treatises, On the Parts of Animals and On the Generation of Animals. Although Aristotle did not claim to have founded the science of zoology, his detailed observations of a wide variety of organisms were quite without precedent.......
-
generation, spontaneous (biology)
the hypothetical process by which living organisms develop from nonliving matter; also, the archaic theory that utilizes this process to explain the origin of life. Pieces of cheese and bread wrapped in rags and left in a dark corner, for example, were thus thought to produce mice, according to this theory, because after several weeks, there were mice in the rags. Many believed in spontaneous gene...
-
generation time (statistics)
The other value needed to calculate the rate at which the population can grow is the mean generation time (T). Generation time is the average interval between the birth of an individual and the birth of its offspring. To determine the mean generation time of a population, the age of the individuals (x) is multiplied by the proportion of females surviving to that age......
-
generationism (theology)
...and Menschseele und Physiologie (1855; “Human Souls and Physiology”). They were placed on the church’s Index of Forbidden Books in 1857 because of their expressed views on generationism, a condemned theory stating that the human soul is created from unliving matter in the act of procreation. Though Frohschammer’s generationist views were moderate, he wa...
-
generations, alternation of (biology)
in biology, the alternation of a sexual phase and an asexual phase in the life cycle of an organism. The two phases, or generations, are often morphologically, and sometimes chromosomally, distinct....
-
Generations of Men, The (work by Wright)
...curious convergences that mark literary history. A number of writers began publishing works of an autobiographical kind in which the emphasis lay elsewhere than on the self. Judith Wright’s The Generations of Men (1959) is a family history, just as Mary Durack’s Kings in Grass Castles (1959) is the story of her ancestors as well as a social history. Marti...
-
Generations of Winter (work by Aksyonov)
...Another, Skazhi izyum (1985; Say Cheese!), is an irreverent portrait of Moscow’s intellectual community during the last years of Leonid Brezhnev’s leadership. Pokolenie zimy (Generations of Winter, 1994) chronicles the fate of a family of intellectuals at the hands of the Soviet regime during the period of Stalin’s rule....
-
Generative Art (painting)
...the 1960s that seem to billow and scintillate with closely placed contrasting colours, qualities that also allied him with the Op art movement. Eduardo MacEntyre of Argentina, a founding member of Generative Art in 1959 in Buenos Aires (with Miguel Angel Vidal and later Ary Brizzi), created paintings that gave the illusion of volume with intersecting geometric lines. MacEntyre’s acrylics...
-
generative grammar
a precisely formulated set of rules whose output is all (and only) the sentences of a language—i.e., of the language that it generates. There are many different kinds of generative grammar, including transformational grammar as developed by Noam Chomsky from the mid-1950s. Linguists disagree as to which, if any, of these different kinds of generative grammar will ...
-
generative nucleus (plant anatomy)
The reproductive cycle in angiosperms can be traced from before the shedding of pollen. The microspores begin their development of male gametophytes, which involves formation of a small generative cell and a tube cell. The generative cell may divide to form two sperm before the pollen grain (developing male gametophyte) is shed, or while the pollen tube is growing during germination. The pollen......
-
generative semantics (linguistics)
According to the original formulation of generative or transformational grammar, the semantic and the syntactic components were regarded as distinct elements in the deep structure of a sentence. The syntactic component consisted of a relation of phrase markers giving the transformational structure of the sentence, usually represented in terms of “tree” diagrams with such nodes as......
-
generator (device)
...and internal-combustion engines are prime movers. In these machines the inputs vary; the outputs are usually rotating shafts capable of being used as inputs to other machines, such as electric generators, hydraulic pumps, or air compressors. All three of the latter devices may be classified as generators; their outputs of electrical, hydraulic, and pneumatic energy can be used as inputs to......
-
generator, electric (instrument)
any machine that converts mechanical energy to electricity for transmission and distribution over power lines to domestic, commercial, and industrial customers. Generators also produce the electrical power required for automobiles, aircraft, ships, and trains....
-
generator rating (electronics)
The capacity of a synchronous generator is equal to the product of the voltage per phase, the current per phase, and the number of phases. It is normally stated in megavolt-amperes (MVA) for large generators or kilovolt-amperes (kVA) for small generators. Both the voltage and the current are the effective, or rms, values (equal to the peak value divided by 2)....
-
generatrix (geometry)
The generatrix of a cone is assumed to be infinite in length, extending in both directions from the vertex. The cone so generated, therefore, has two parts, called nappes or sheets, that extend infinitely. A finite cone has a finite, but not necessarily fixed, base, the surface enclosed by the directrix, and a finite, but not necessarily fixed, length of generatrix, called an element. See......
-
Generelle Morphologie der Organismen (work by Haeckel)
...saw evolution as the basis for a unified explanation of all nature and the rationale of a philosophical approach that denied final causes and the teleology of the church. His Generelle Morphologie der Organismen (1866; “General Morphology of Organisms”) presented many of his evolutionary ideas, but the scientific community was little interested. He set......
-
generic drug
...to charge higher prices for the product so that it can recover the cost of developing the drug. Virtually all drugs have brand names created by the companies that develop them. All drugs also have generic names. After the patent has expired, other companies may market the drug under its generic name or under another brand name. In addition, the price of the patented drug usually decreases when....
-
generic name
Habitation and feature names are either generic or specific, or a combination of the two. A generic name refers to a class of names such as river, mountain, or town. A specific name serves to restrict or modify the meaning of the place-name. Most of the world’s languages can be divided into two groups based on the general tendency to have the specific either precede or follow the generic. I...
-
género chico (Spanish literature)
(Spanish: “little genre”), Spanish literary genre of light dramatic or operatic one-act playlets, as contrasted with the género grande of serious drama or opera. Developed primarily in the theatres of Madrid during the later 19th century, género chico works usually dealt with Madrid’s lower classes, whose way of life was regarded with mingled senti...
-
Générosité, Ordre de la (Prussian honorary order)
distinguished Prussian order established by Frederick II the Great in 1740, which had a military class and a class for scientific and artistic achievement. This order superseded the Ordre de la Générosité (French: “Order of Generosity”) that was founded by Frederick I of Prussia in 1667....
-
genes (heredity)
unit of hereditary information that occupies a fixed position (locus) on a chromosome. Genes achieve their effects by directing the synthesis of proteins....
-
Genesee (county, New York, United States)
county, northwestern New York state, U.S., located in a lowland region with several swamps, midway between Buffalo and Rochester. It is drained by Tonawanda, Oak Orchard, and Oatka creeks. The major forest types are oak and hickory. Public lands include Iroquois National Wildlife Refuge and Darien Lakes State Park; Tonawanda Indian Reservati...
-
Genesee College (university, Syracuse, New York, United States)
private, coeducational institution of higher education, located in Syracuse, New York, U.S. It offers more than 200 undergraduate, graduate, and professional programs through 15 colleges and schools. Research facilities include the All-University Gerontology Center (established 1972), the Center for Advanced Technology in Computer Applications and Software Engineering (1984), an...
-
Genesee River (river, United States)
river mainly in New York state, U.S. The Genesee flows generally north from its headwaters in Pennsylvania, crosses the New York State Canal System, and bisects Rochester to enter Lake Ontario after a course of 158 miles (254 km). At Portageville, midway along its course, the river flows into a 17-mile- ...
-
Genesis (Old English poem)
...paraphrases copied about 1000, given in 1651 to the scholar Franciscus Junius by Archbishop James Ussher of Armagh and now in the Bodleian Library, University of Oxford. It contains the poems Genesis, Exodus, Daniel, and Christ and Satan, originally attributed to Caedmon (q.v.) because these subjects correspond roughly to the subjects described in Bede’s......
-
Genesis (British rock group)
British progressive rock group noted for their atmospheric sound in the 1970s and extremely popular albums and singles of the 1980s and ’90s. The principal members were Peter Gabriel (b. Feb. 13, 1950Woking, Surrey, Eng.), To...
-
Genesis (spacecraft)
British progressive rock group noted for their atmospheric sound in the 1970s and extremely popular albums and singles of the 1980s and ’90s. The principal members were Peter Gabriel (b. Feb. 13, 1950Woking, Surrey, Eng.), To...
-
Genesis (Old Testament)
the first book of the Old Testament. Its name derives from the opening words: “In the beginning….” Genesis narrates the primeval history of the world (chapters 1–11) and the patriarchal history of the Israelite people (chapters 12–50). The primeval history includes the familiar stories of the Creation, the Garden of Eden, Cain and Abel, Noah and the Flood, and th...
-
Genesis Apocryphon (apocryphal work)
pseudepigraphal work (not accepted in any canon of scripture), one of the most important works of the Essene community of Jews, part of whose library was discovered in 1947 in caves at Qumrān, near the Dead Sea, in Palestine. The scroll, the last of seven scrolls discovered in Cave I, is also the least well preserved. Examination of the entire scroll showed it to be a collection of apocryp...
-
“Genesis, Little” (pseudepigraphal work)
pseudepigraphal work (not included in any canon of scripture), most notable for its chronological schema, by which events described in Genesis on through Exodus 12 are dated by jubilees of 49 years, each of which is composed of seven cycles of seven years. The institution of a jubilee calendar supposedly would ensure the observance of Jewish religious festivals and holy days on the proper dates an...
-
Genesis of a Music, The (work by Partch)
Later Partch was involved with “tactile” theatre pieces, which have the nature of rituals. In 1949 he summarized his esoteric theories in a book, The Genesis of a Music. In 1953 he began issuing his own recordings, and in 1966 he won an award from the National Institute of Arts and Letters....
-
Genesis of a Novel, The (work by Mann)
The composition of the novel was fully documented by Mann in 1949 in The Genesis of a Novel. Doktor Faustus exhausted him as no other work of his had done, and The Holy Sinner and The Black Swan, published in 1951 and 1953, respectively, show a relaxation of intensity in spite of their accomplished, even virtuoso style. Mann rounded off his imaginative work in 1954 with......
-
Genesius, Joseph (Byzantine scholar)
Byzantine scholar whose history of Constantinople is one of the few known sources on the relatively obscure 9th-century period of Byzantine history....
-
Genest, Edmond-Charles (French emissary)
French emissary to the United States during the French Revolution who severely strained Franco-American relations by conspiring to involve the United States in France’s war against Great Britain....
-
genet (genus of mammal)
any of about five species of lithe, catlike carnivores of the genus Genetta, family Viverridae. Genets are elongate, short-legged animals with long, tapering tails; pointed noses; large, rounded ears; and retractile claws. Coloration varies among species but usually is pale yellowish or grayish, marked with dark spots and stripes; the tail is banded black and white. Adult genets weigh 1...
-
Genêt (American writer)
American writer who was the Paris correspondent for The New Yorker magazine for nearly half a century....
-
Genêt, Edmond Charles (French emissary)
French emissary to the United States during the French Revolution who severely strained Franco-American relations by conspiring to involve the United States in France’s war against Great Britain....
-
Genet, Edmond-Charles (French emissary)
French emissary to the United States during the French Revolution who severely strained Franco-American relations by conspiring to involve the United States in France’s war against Great Britain....
-
Genet, Jean (French writer)
French criminal and social outcast turned writer who, as a novelist, transformed erotic and often obscene subject matter into a poetic vision of the universe and, as a dramatist, became a leading figure in the avant-garde theatre, especially the Theatre of the Absurd....
-
Genêt Pass (mountain pass, North Africa)
...Middle Atlas. Passes are natural routes across the mountain barriers and thus constitute strategic points. The focal point of communication in the Great Kabylie, for example, is Tizi Ouzou, at the Genêt Pass, which has become in effect the capital of the massif. To surmount the obstacle formed by the Ouarsenis Massif, situated between Chelif Plain and the Sersou Plateau, it is necessary....
-
genethlialogy (pseudoscience)
...the course of his life on the basis of the positions of the planets and of the zodiacal signs (the 12 astrological constellations) at the moment of his birth or conception. From this science, called genethlialogy (casting nativities), were developed the fundamental techniques of astrology. The main subdivisions of astrology that developed after genethlialogy are general, catarchic, and......
-
genetic algorithm (computer science)
...the faculty at Michigan after graduation and over the next four decades directed much of the research into methods of automating evolutionary computing, a process now known by the term genetic algorithms. Systems implemented in Holland’s laboratory included a chess program, models of single-cell biological organisms, and a classifier system for controlling a simulated......
-
genetic change (biology)
Genetic changes underlie all evolutionary processes. In order to understand speciation and its role in evolution, it is useful to know how much genetic change takes place during the course of species development. It is of considerable significance to ascertain whether new species arise by altering only a few genes or whether the process requires drastic changes—a genetic......
-
genetic code
the sequence of nucleotides in deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) that determines the amino acid sequence of proteins. Though the linear sequence of nucleotides in DNA contains the information for protein sequences, proteins are not made directly from DNA. Instead, a messenger RNA (mRNA) molecule is syn...
-
Genetic Control of Biochemical Reactions in Neurospora (work by Beadle and Tatum)
In addition, the use of genetics to study the biochemistry of microorganisms, outlined in the landmark paper “Genetic Control of Biochemical Reactions in Neurospora” (1941), by Beadle and Tatum, opened up a new field of research with far-reaching implications. Their methods immediately revolutionized the manufacture of penicillin and provided insights into many biochemical......
-
genetic correlation
Genetic correlation occurs when a single gene affects two traits. There may be many such genes that affect two or more traits. Genetic correlations can be positive or negative, which is indicated by assigning a number in the range from +1 to − 1, with 0 indicating no genetic correlation. A correlation of +1 means that the traits always occur together, while a correlation of......
-
genetic counselling
Genetic counseling represents the most direct medical application of the advances in understanding of basic genetic mechanisms. Its chief purpose is to help people make responsible and informed decisions concerning their own health or that of their children. Genetic counseling, at least in democratic societies, is nondirective; the counselor provides information, but decisions are left up to......
-
genetic disease
Genetic counseling represents the most direct medical application of the advances in understanding of basic genetic mechanisms. Its chief purpose is to help people make responsible and informed decisions concerning their own health or that of their children. Genetic counseling, at least in democratic societies, is nondirective; the counselor provides information, but decisions are left up to.........
-
genetic disease, human
any of the diseases and disorders that are caused by mutations in one or more genes....
-
genetic disorder
any of the diseases and disorders that are caused by mutations in one or more genes.......
-
genetic distance
...genes of different species. Genetic change is measured with two parameters—genetic identity (I), which estimates the proportion of genes that are identical in two populations, and genetic distance (D), which estimates the proportion of gene changes that have occurred in the separate evolution of two populations. The value of I may range between 0 and 1, which......
-
genetic drift
a change in the gene pool of a small population that takes place strictly by chance. Genetic drift can result in genetic traits being lost from a population or becoming widespread in a population without respect to the survival or reproductive value of the alleles involved. A random statistical effect, genetic drift can occur only in small, isolated populations in which the gene pool is small enou...
-
genetic engineering
the artificial manipulation, modification, and recombination of DNA or other nucleic acid molecules in order to modify an organism or population of organisms....
-
genetic epistemology (psychology)
...the child as constantly creating and re-creating his own model of reality, achieving mental growth by integrating simpler concepts into higher-level concepts at each stage. He argued for a “genetic epistemology,” a timetable established by nature for the development of the child’s ability to think, and he traced four stages in that development. He described the child during...
-
genetic equilibrium
Genetic variation is present throughout natural populations of organisms. This variation is sorted out in new ways in each generation by the process of sexual reproduction, which recombines the chromosomes inherited from the two parents during the formation of the gametes that produce the following generation. But heredity by itself does not change gene frequencies. This principle is stated by......
-
genetic expression (biology)
The transcription of the genetic code from DNA to RNA, and the translation of that code from RNA into protein, exerts the greatest influence on the modulation of genetic information. The process of genetic expression takes place over several stages, and at each stage is the potential for further differentiation of cell types....
-
genetic heterogeneity (genetics)
...mutations, all affecting the same gene, may be seen in the affected population (allelic heterogeneity). In some cases even mutations in different genes can lead to the same clinical disorder (genetic heterogeneity). Achondroplasia is characterized by allelic homogeneity, such that essentially all affected individuals carry exactly the same mutation....
-
genetic homeostasis
As a result of stabilizing selection, populations often maintain a steady genetic constitution with respect to many traits. This attribute of populations is called genetic homeostasis....
-
genetic identity (botany)
...speciation has become answerable only with the relatively recent development of appropriate methods for comparing genes of different species. Genetic change is measured with two parameters—genetic identity (I), which estimates the proportion of genes that are identical in two populations, and genetic distance (D), which estimates the proportion of gene changes that have......
-
genetic imprinting
Some genetic disorders are now known to result from mutations in imprinted genes. Genetic imprinting involves a sex-specific process of chemical modification to the imprinted genes, so that they are expressed unequally, depending on the sex of the parent of origin. So-called maternally imprinted genes are generally expressed only when inherited from the father, and so-called paternally......
-
genetic industry (economics)
This sector of a nation’s economy includes agriculture, forestry, fishing, mining, quarrying, and the extraction of minerals. It may be divided into two categories: genetic industry, including the production of raw materials that may be increased by human intervention in the production process; and extractive industry, including the production of exhaustible raw materials that cannot be......
-
genetic intervention (ecology)
In small populations, inbreeding can cause genetic variability to be lost quite quickly. A simple example is provided by the Y chromosome in humans (and other mammals), which confers maleness and which behaves like human surnames do in large parts of the world. If every human couple had just two children each generation, then by chance alone 25 percent of the couples would have two sons, each......
-
genetic isolate (genetics)
...is calculated from the average F values of its members. High values of F are found in small populations whose members marry one another over many generations. Such groups are called isolates. Thus, the Samaritans, who have remained a small but distinctive group since the 8th century bc, are considerably inbred, and in the United States some religious groups also live...
-
Genetic Logic (work by Baldwin)
...Associated with Johns Hopkins University, Baltimore (1903–09), he then spent five years in Mexico City as an adviser to the National University of Mexico. During this period he completed Genetic Logic, 3 vol. (1906–11), which examined the nature and development of thought and meaning. Settling in Paris (1913), he lectured at various provincial universities and in 1919......
-
genetic map
...Hunt Morgan. He and Morgan designed experiments using the fruit fly, Drosophila melanogaster, which showed that heritable variations in the insect could be traced to observable changes in its chromosomes. These experiments led to the construction of “gene maps” and proved the chromosome theory of heredity. Bridges, with Morgan and Alfred Henry Sturtevant, published these......
-
genetic method (climate classification)
...Empirical methods make use of observed environmental data, such as temperature, humidity, and precipitation, or simple quantities derived from them (e.g., evaporation). In contrast, a genetic method classifies climate on the basis of its causal elements, the activity and characteristics of all factors (air masses, circulation systems, fronts, jet streams, solar radiation,......
-
genetic mutation (genetics)
an alteration in the genetic material (the genome) of a cell of a living organism or of a virus that is more or less permanent and that can be transmitted to the cell’s or the virus’s descendants. (The genomes of organisms are all composed of DNA, whereas viral genomes can be of DNA or RNA;...
-
genetic polymorphism (biology)
in biology, a discontinuous genetic variation resulting in the occurrence of several different forms or types of individuals among the members of a single species. A discontinuous genetic variation divides the individuals of a population into two or more sharply distinct forms. The most obvious example of this is the separation of most higher organisms into male and female sexe...
-
genetic repressor (biochemistry)
...genes are linked to an operator gene in a functional unit called an operon. Ultimately, the activity of the operon is controlled by a regulator gene, which produces a small protein molecule called a repressor. The repressor binds to the operator gene and prevents it from initiating the synthesis of the protein called for by the operon. The presence or absence of certain repressor molecules......
-
genetic sampling error
a change in the gene pool of a small population that takes place strictly by chance. Genetic drift can result in genetic traits being lost from a population or becoming widespread in a population without respect to the survival or reproductive value of the alleles involved. A random statistical effect, genetic drift can occur only in small, isolated populations in which the gene pool is small enou...
-
Genetic Studies of Genius (work by Terman)
Findings from the study, which was projected to continue until about 2010, were first reported in Terman et al., Genetic Studies of Genius, 5 vol. (1926–59). Terman’s successors continued to publish books on the longitudinal study that Terman began in the first half of the 20th century. Terman’s other investigations were reported in Sex and Personality...
-
genetic testing
In the case of genetic disease, options often exist for presymptomatic diagnosis—that is, diagnosis of individuals at risk for developing a given disorder, even though at the time of diagnosis they may be clinically healthy. Options may even exist for carrier testing, studies that determine whether an individual is at increased risk of having a child with a given disorder, even though he......
-
genetically modified crop (agriculture)
...and the Environmental Protection Agency, regulate the use of genetically engineered organisms. As of 2006, more than 250 million acres (100 million hectares) worldwide were planted with genetically modified (GM) crops. Among the most successful GM crops are corn (maize), soybeans, and cotton, all of which have proved valuable to farmers with respect to producing increased yields and......
-
genetically modified food (agriculture)
...and the Environmental Protection Agency, regulate the use of genetically engineered organisms. As of 2006, more than 250 million acres (100 million hectares) worldwide were planted with genetically modified (GM) crops. Among the most successful GM crops are corn (maize), soybeans, and cotton, all of which have proved valuable to farmers with respect to producing increased yields and......
-
genetically modified organism
Agricultural applications of biotechnology have proved the most controversial. Some activists and consumer groups have called for bans on genetically modified organisms (GMOs) or for labeling laws to inform consumers of the growing presence of GMOs in the food supply. The introduction of GMOs into agriculture began in 1993, when the FDA approved bovine somatotropin (BST), a growth hormone that......
-
Genetics (journal)
...first hybrids before 1910, commercial production of them did not begin until 1922. Since that time hybrids have been adopted in all the developed countries of the world. He founded the journal Genetics in 1916, acting as managing editor for nine years and for many years more as an associate editor. He was honoured in 1940 with the De Kalb Agricultural Association Medal and in 1949 with.....
-
genetics
study of heredity in general and of genes in particular....
-
Genetics and the Origin of Species (work by Dobzhansky)
...the groundwork for a theory combining Darwinian evolution and Mendelian genetics. Starting his career about this time, Dobzhansky was involved in the project almost from its inception. His book Genetics and the Origin of Species (1937) was the first substantial synthesis of the subjects and established evolutionary genetics as an independent discipline. Until the 1930s, the commonly......
-
genetics, human (biology)
study of the inheritance of characteristics by children from parents. Inheritance in humans does not differ in any fundamental way from that in other organisms....
-
Genetiva Iulia (Roman colony)
...century ad there were nine such foundations in Baetica, eight in Tarraconensis, and five in Lusitania. An inscription from one of these colonies, the colonia Genetiva Iulia at Urso (Osuna), which contains material from the time of its foundation under Julius Caesar, shows a community of Roman citizens with their own magistrates and religious o...
-
Genetta (genus of mammal)
any of about five species of lithe, catlike carnivores of the genus Genetta, family Viverridae. Genets are elongate, short-legged animals with long, tapering tails; pointed noses; large, rounded ears; and retractile claws. Coloration varies among species but usually is pale yellowish or grayish, marked with dark spots and stripes; the tail is banded black and white. Adult genets weigh 1...
-
Genetta genetta (mammal)
Except for the small-spotted genet (G. genetta), which also occurs in western Asia and southern Europe, they are found only in Africa. Genets live alone or in pairs and are active mainly at night. They frequent forests, grasslands, and brush and are as agile in the trees as on the ground. They prey on small mammals and birds. Litters contain two or three young. ...
-
Geneva (Nebraska, United States)
Except for the small-spotted genet (G. genetta), which also occurs in western Asia and southern Europe, they are found only in Africa. Genets live alone or in pairs and are active mainly at night. They frequent forests, grasslands, and brush and are as agile in the trees as on the ground. They prey on small mammals and birds. Litters contain two or three young. ......
-
Geneva (New York, United States)
city, Ontario county, west-central New York, U.S. It lies at the northern end of Seneca Lake, in the Finger Lakes region, 48 miles (77 km) southeast of Rochester. The site, once part of the Pulteney Estate, was first settled in 1788 and named (1792) by land promoter Captain Charles Williamson because its lakeside locale re...
-
Geneva (Switzerland)
city, capital of Genève canton, in the far southwestern corner of Switzerland that juts into France. One of Europe’s most cosmopolitan cities, Geneva has served as a model for republican government and owes its preeminence to the triumph of human, rather than geographic, factors. It developed its unique character from the 16th century, when, as the centre of the Ca...
-
Geneva (canton, Switzerland)
canton, southwestern Switzerland. The canton lies between the Jura Mountains and the Alps and consists mainly of its capital, the city of Geneva (Genève). It is one of the smallest cantons in the Swiss Confederation. Bordering on Vaud canton for 3.5 miles (5.5 km) in the extreme north, it is otherwise surrounded by French territory—the département of ...
-
Geneva (alcoholic beverage)
Netherlands gins, known as Hollands, geneva, genever, or Schiedam, for a distilling centre near Rotterdam, are made from a mash containing barley malt, fermented to make beer. The beer is distilled, producing spirits called malt wine, with 50–55 percent alcohol content by volume. This product is distilled again with juniper berries and other botanicals, producing a final product......
-
Geneva (Indiana, United States)
town, Adams county, eastern Indiana, U.S., on the Wabash River, 36 miles (58 km) northeast of Muncie. It was created in 1874 through the incorporation of the towns of Buffalo and Alexander and the Geneva train station (on the Grand Rapids and Indiana Railroad) and presumably was named for the Swiss city. A rural community with many Old Order Amish and Swiss Mennonite families, i...
-
Geneva, Academy of (academy, Geneva, Switzerland)
private school of education founded at Geneva, Switz., in 1912 by a Swiss psychologist, Édouard Claparède, to advance child psychology and its application to education. A pioneer of scientific-realist education, Claparède believed that, as opposed to automatic learned performance or simple reflex, thinking must be developed in children, and that education mu...
-
Geneva Accords (history of Indochina)
collection of documents relating to Indochina and issuing from the Geneva Conference of April 26–July 21, 1954, attended by representatives of Cambodia, the People’s Republic of China, France, Laos, the United Kingdom, the United States, the Soviet Union...
We welcome your comments. Any revisions or updates suggested for this article will be reviewed by our editorial staff. Contact us here.
Regular users of Britannica may notice that this comments feature is less robust than in the past. This is only temporary, while we make the transition to a dramatically new and richer site. The functionality of the system will be restored soon.