Question

What long-term effects can gene flow have on any two populations that are exchanging genes?

Answer 1

Effect of Gene Flow--Gene flow is an important mechanism for transferring genetic diversity among populations. Migrants change the distribution of genetic diversity among populations, by modifying allele frequencies (the proportion of members carrying a particular variant of a gene).

High rates of gene flow can reduce the genetic differentiation between the two groups, increasing homogeneity.[4] For this reason, gene flow has been thought to constrain speciation and prevent range expansion by combining the gene pools of the groups, thus preventing the development of differences in genetic variation that would have led to differentiation and adaptation.

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