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genetic drift

   Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.15 sec.
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.

genetic drift
Fluctuations 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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Although selection and/or other factors cannot be totally excluded, the observed reduction in diversity is likely the result of genetic drift exacerbated by declines in [N.
Complicating problems of origin, all of the pandemic and epidemic influenza A viruses that have appeared since 1918 have been descendants of it, arising by either genetic drift, reassortment with prevalent avian viruses, or in 1 case (1977) by apparent release from a freezer.
Companies in this sector now must wrestle with legitimate public concerns about biotech, food crop contamination, species diversity, genetic drift and environmental impact.
 
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