African populations are shown to experience low levels of mitochondrial DNA gene flow, but high levels of Y chromosome gene flow. In particular, Y chromosome gene flow appears to be asymmetric, i.e., from the Bantu-speaking population into other African populations.
http://www.genetics.org/cgi/content/full/177/4/2195
http://www.genetics.org/cgi/content/full/177/4/2195
Originally posted by byakhee_2001
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