Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

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

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun genetics, evolutionary theory An overall shift of allele distribution in an isolated population, due to random fluctuations in the frequencies of individual alleles of the genes.

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