The ‘Human genome diversity project’ came to this conclusion. How come? Wouldn’t you rather expect that because the groups separated earlier, there would be more variation?
Answer
Hi Koen,
Genetic variation is determined from generation to generation by selection, mutations, gene flow (exchange of genes between populations as a result of migrations), and genetic drift (random changes in the frequency of gene variants – or alleles – within populations). Between populations (certainly in humans) there is usually sufficient exchange (gene flow) to keep the genetic variation between populations relatively limited. In theory, you only need one migrant per generation for this. Also in animals and plants, the genetic variation within a population (between individuals) is usually (much) greater than the genetic variation between populations.
Answered by
Dr. Peter Galbusera
population genetics of animals
Queen Astridplein 26 2018 Antwerp
http://www.kmda.org/
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