Definitions for genetic drift
ge·netic drift

WiktionaryRate this definition:0.0 / 0 votes

1. genetic driftnoun

   An overall shift of allele distribution in an isolated population, due to random fluctuations in the frequencies of individual alleles of the genes.

WikipediaRate this definition:0.0 / 0 votes

1. Genetic drift

   Genetic drift, also known as allelic drift or the Wright effect, is the change in the frequency of an existing gene variant (allele) in a population due to random chance.Genetic drift may cause gene variants to disappear completely and thereby reduce genetic variation. It can also cause initially rare alleles to become much more frequent and even fixed. When few copies of an allele exist, the effect of genetic drift is more notable, and when many copies exist, the effect is less notable. In the middle of the 20th century, vigorous debates occurred over the relative importance of natural selection versus neutral processes, including genetic drift. Ronald Fisher, who explained natural selection using Mendelian genetics, held the view that genetic drift plays at most a minor role in evolution, and this remained the dominant view for several decades. In 1968, population geneticist Motoo Kimura rekindled the debate with his neutral theory of molecular evolution, which claims that most instances where a genetic change spreads across a population (although not necessarily changes in phenotypes) are caused by genetic drift acting on neutral mutations. In the 1990s, constructive neutral evolution was proposed which seeks to explain how complex systems emerge through neutral transitions.

WikidataRate this definition:5.0 / 1 vote

1. Genetic drift

   Genetic drift or allelic drift is the change in the frequency of a gene variant in a population due to random sampling. The alleles in the offspring are a sample of those in the parents, and chance has a role in determining whether a given individual survives and reproduces. A population's allele frequency is the fraction of the copies of one gene that share a particular form. Genetic drift may cause gene variants to disappear completely and thereby reduce genetic variation. When there are few copies of an allele, the effect of genetic drift is larger, and when there are many copies the effect is smaller. Vigorous debates occurred over the relative importance of natural selection versus neutral processes, including genetic drift. Ronald Fisher held the view that genetic drift plays at the most a minor role in evolution, and this remained the dominant view for several decades. In 1968 Motoo Kimura rekindled the debate with his neutral theory of molecular evolution, which claims that most instances where a genetic change spreads across a population are caused by genetic drift.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Genetic Drift

   The fluctuation of the ALLELE FREQUENCY from one generation to the next.

How to pronounce genetic drift?

1. Alex

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How to say genetic drift in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of genetic drift in Chaldean Numerology is: 9

2. Pythagorean Numerology

   The numerical value of genetic drift in Pythagorean Numerology is: 3

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Genetic_Drift
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Genetic_Drift
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=genetic drift