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  1. Oxford Dictionary

    genetic drift

    • n.
      variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce.

    • noun: genetic drift

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    genetic drift

    • IPA[jəˈnedik drift]
    • n.
      variation in the relative frequency of different genotypes in a small population, owing to the ...

    Oxford American Dictionary