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the blood group b is almost absent in native americans, whose ancestors arrived in very small numbers about 1,000 years ago. which factor is responsible for this phenomenon
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the blood group b is almost absent in native americans, whose ancestors arrived in very small numbers about 1,000 years ago. which factor is responsible for this phenomenon

User Lucasvscn
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"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.
User David Runger
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