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Human Heterozygotes for Sickle Cell Anemia Are Selectively More Fit

Question 25

Multiple Choice

Human heterozygotes for sickle cell anemia are selectively more fit than the normal homozygotes and considerably more fit than individuals homozygous for the sickle cell allele.This enhanced fitness of the heterozygotes is known as


A) adaptive value.
B) reproductive fitness.
C) heterozygous advantage.
D) hybrid vigor.
E) genetic drift.

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