genetic drift

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genetic drift

n.
Variation in gene frequencies in a population due to chance rather than natural selection, mutation, or immigration.

genet′ic drift′


n.
random changes in the frequency of alleles in a gene pool, usu. of small populations. Compare gene flow.
[1955–60]
References in periodicals archive ?
Malaria life cycle intensifies both natural selection and random genetic drift.
The continuous increase in the total loss of GD due to the unequal founder contribution and random genetic drift over the last decade has been observed only in CLWs and PN breeds.
Technically, all finite populations are subject to some degree of random genetic drift because the number of reproductive propagules produced is always less than the number of multilocus genotypes that are possible.