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Founder Effect

Genetic Characteristics Of Founder Populations, Founder Populations Can Be Valuable For Genetic Studies

The term "founder effect" refers to the observation that when a small group of individuals breaks off from a larger population and establishes a new population, chance plays a large role in determining which alleles are represented in the new population. The particular alleles may not be representative of the larger population. As the new population grows, the allele frequencies will usually continue to reflect the original small group.

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Medicine EncyclopediaGenetics in Medicine - Part 2