BioScience Dictionary

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Found Founder effect 2 times.

Displaying results 1 to 10.

1. Founder effect
"The establishment of a new population by a few original founders (in an extreme case, by a single fertilized female) which carry only a small fraction of the total genetic variation of the parental population" [Ernst Mayr, 1963]. The result is that a given allele , gene , chromosome , or part of a chromosome found in members of the population can be traced back to one ancestral individual.

2. Founder effect
The difference in gene pools between an original population and a new population founded by one or a few individuals randomly separated from the original population, as when an island population is founded by one or a few individuals; often accentuates genetic drift .