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<p>In <a href="page.php?w=population_genetics">population genetics</a>, <b>gene flow</b> (also known as <b>migration</b> and <b>allele flow</b>) is the transfer of <a href="page.php?w=genetic_variation">genetic</a> material from one <a href="page.php?w=Population_%28biology%29">population</a> to another.  If the rate of gene flow is high enough, then two populations will have equivalent <a href="page.php?w=allele">allele</a> frequencies and therefore can be considered a single effective population. It has been shown that it takes only "one migrant</p><p>
<a accesskey="3" href="page.php?w=gene_flow&amp;p=2">3.Next</a>
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