Multiple choice

The concept that South and Central American Indians are nearly 100% type O for the ABO blood system, which can be best explained as being the consequence of

  1. genetic drift

  2. natural selection

  3. the founder effect

  4. bottleneck effect
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

It is likely that most of these Native Americans are descended from a small band of closely related early immigrant founders who also shared this blood type.

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