In the universal ABO blood grouping system, there are four phenotypes - A, B, AB, and O - which are determined by
three different alleles. The presence of three alleles in the ABO blood grouping system is an example of ____.
a. a polymorphism
b. genetic drift
c. the bottleneck effect
d. a dimorphism
e. the founder effect
ANSWER: a
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What will be an ideal response?
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Which of the following factors should make females the "choosier" sex?
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