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