founder effect

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Related to Founding population: Founder principle, Founder event, Founder population, Effective founder population

founder effect

[′fau̇n·dər i‚fekt]
(genetics)
The overrepresentation of a specific allele at one or more loci in a new population that arises from a small number of individuals whose small gene pool may be unrepresentative of the parental population initially or as a result of the ensuing genetic drift.
References in periodicals archive ?
That pattern is consistent with a scenario in which moose populations worldwide trace back to recent population expansion combined with small sizes of founding populations (Hundertmark et al.
Analyses of DNA sequences from larger numbers of Asians and Native Americans could yield different estimates of the founding population in the New World, Schurr adds.
These beasts of burden then served as the founding population for modern cattle breeds throughout the world, the predominant theory holds.
He estimates that it took just a few thousand years for a founding population of 600 Stone Age people to travel from what's now India to southeastern Asia and then to Australia.
The analysis indicated that within 400 years of entering Europe, the founding population split into at least three major groups: One stayed in the Balkan Mountains, another pressed north of the Danube River, and the third moved on to Western Europe.
Mexico harbored that founding population, in Pope's view.
The Hp1 allele frequency of the island's population is remarkably higher than those of the constituting founding populations (9), a finding that pleads the case for genetic selection based on Hp phenotype during the migration.