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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Wahlund effect ： ウィキペディア英語版 Wahlund effect In population genetics, the Wahlund effect refers to reduction of heterozygosity (that is when an organism has two different alleles at a locus) in a population caused by subpopulation structure. Namely, if two or more subpopulations have different allele frequencies then the overall heterozygosity is reduced, even if the subpopulations themselves are in a Hardy-Weinberg equilibrium. The underlying causes of this population subdivision could be geographic barriers to gene flow followed by genetic drift in the subpopulations. The Wahlund effect was first documented by the Swedish geneticist Sten Wahlund in 1928. == Simplest example == Suppose there is a population $P$, with allele frequencies of A and a given by $p$ and $q$ respectively ($p\; +\; q\; =\; 1$). Suppose this population is split into two equally-sized subpopulations, $P\_1$ and $P\_2$, and that all the ''A'' alleles are in subpopulation $P\_1$ and all the ''a'' alleles are in subpopulation $P\_2$ (this could occur due to drift). Then, there are no heterozygotes, even though the subpopulations are in a Hardy-Weinberg equilibrium. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Wahlund effect」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.