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.

founder effect

found·er ef·fect

an unusually high frequency of a gene in a particular population derived from a small set of unrepresentative ancestors.

founder effect

n. A random difference in allele frequencies of a population founded by a small group of organisms relative to the allele frequencies in the original population.

founder effect

the result of starting a new population with a low number of individuals (founders), so that their GENE POOL may not contain the same proportions of ALLELES for a particular LOCUS as in the original population. For example, instead of containing three alleles of the ABO BLOOD GROUP locus, Australian aborigines contain no B alleles and thus no Group B or Group AB individuals are produced, a situation probably caused by a ‘founder effect’. Such small founder populations are subject to RANDOM GENETIC DRIFT.

单词	founder effect
释义	founder effect founder effect n. A random difference in allele frequencies of a population founded by a small group of organisms relative to the allele frequencies in the original population. founder effect 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. founder effect found·er ef·fect an unusually high frequency of a gene in a particular population derived from a small set of unrepresentative ancestors. founder effect n. A random difference in allele frequencies of a population founded by a small group of organisms relative to the allele frequencies in the original population. founder effect the result of starting a new population with a low number of individuals (founders), so that their GENE POOL may not contain the same proportions of ALLELES for a particular LOCUS as in the original population. For example, instead of containing three alleles of the ABO BLOOD GROUP locus, Australian aborigines contain no B alleles and thus no Group B or Group AB individuals are produced, a situation probably caused by a ‘founder effect’. Such small founder populations are subject to RANDOM GENETIC DRIFT.
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