Gene flow
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In population genetics, gene flow is the transfer of genetic material from one population to another. If the rate of gene flow is high enough, then two populations will have equivalent allele frequenc
Marine iguana of the Galapagos Islands evolved via allopatric speciation, through limited gene flow and geographic isolation.
Allopatric speciation
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Allopatric speciation is a mode of speciation that occurs when biological populations become geographically isolated from each other to an extent that prevents or interferes with gene flow. Its name c
Gene flow
…known: N m = ( ( 1 / F S T ) − 1 ) / 4 = 1 − F S T 4 ∗ F S T , Nm = number of migrants. When gene flow is blocked by physical barriers, the outcome is Allopatric speciation or a geographical isolation that does not allow populations of the same species to exchange genetic material. Physical barriers to gene flow are usually…
A female cobalt blue zebra cichlid
Ernst Mayr in 1994
Darwin's finches by Gould