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 ?
66) GM crops may also contaminate non-GM crops through gene drift and cross-pollination, which is no longer a risk but a reality.
Another concern is the contamination of non-GM crops by GMOs through gene drift and cross-pollination.