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Question
The persistence of the sickle-cell anemia allele in the African population is the result ofa. a high rate of mutation of the normal allele to the sickle-cell anemia allele.
b. the advantage of the heterozygous form over the homozygous forms.
c. nonrandom mating.
d. a decline in the occurrence of malaria in Africa.
e. genetic drift.
Answer
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