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

Biology & Microbiology

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