Genetic-drift meaning

The definition of genetic drift is a change in the genes of a group because of the random nature of reproduction.

An example of genetic drift is when only one person in a village has green eyes, but his children do not have the green eye gene and the gene disappears from the population.

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Variation in gene frequencies in a population due to chance rather than natural selection, mutation, or immigration.
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In evolution,
  • A random change in gene frequency within a small population, resulting in mutations which, regardless of their adaptive value, become fixed within the group.
  • Any such process.
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Variation in gene frequencies in a population due to chance rather than natural selection, mutation, or immigration.
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Variation in the frequency of a gene in a small isolated population, thought to be due to random chance rather than natural selection.
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(genetics, evolutionary theory) An overall shift of allele distribution in an isolated population, due to random fluctuations in the frequencies of individual alleles of the genes.
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