«We can not say exactly how and when
this gene flow happened, but one possibility is that it came through the Aleutian Islanders living off the coast of Alaska.»
It's not yet clear whether the two episodes of
gene flow happened at low levels over a long time or in discrete pulses.
Not exact matches
«What
happened here was most likely an increase in population size, with increasing fecundity, and higher levels of mobility and
gene flow so that, over time, Neolithic Near Eastern villages became more cosmopolitan, and this eventually triggered expansion into Europe.»
The new finding shows that «
gene flow across taxonomic boundaries
happens,» observes geneticist Michael F. Hammer of the University of Arizona.