The blood group B is almost absent in Native Americans, whose ancestors arrived in very small numbers about 10,000 years ago. Which factor is responsible for this phenomenon?
a, migration effect b, founder effect c,bottleneck effect are the options
"Founder effect" is the one factor among the choices given in the question that is responsible for this phenomenon. The correct option among all the options that are given in the question is the second option or option "B". I hope that this is the answer that has actually come to your great help.
