random changes in the frequency of alleles in a gene pool, usually of small populations.
genetic drift n.
Random fluctuations in the frequency of the appearance of a gene in a small isolated population, presumably owing to chance rather than natural selection. Also called drift.
Fluctuations in the frequency of a gene in a small isolated population, thought to be due to random chance rather than natural selection.
A term that describes the random fluctuations in a gene pool over time. In large populations, the effects of genetic drift are negligible. (Compare natural selection.)
- Generalized epilepsy
generalized epilepsy n. See grand mal.
- Generalized cortical hyperostosis
generalized cortical hyperostosis n. See Van Buchem’s syndrome.
- Generalized anxiety disorder
generalized anxiety disorder n. An anxiety neurosis or state characterized by an overall anxious mood lasting at least one month and including such symptoms as jitteriness, sweating, feelings of catastrophe concerning one’s family or self, and irritability.
- Generalized anaphylaxis
generalized anaphylaxis n. The immediate anaphylactic response of a sensitized individual following his or her inoculation with an antigen. Also called systemic anaphylaxis.