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The Example That the Heterozygote HbS HbA, One Sickle-Cell Allele

Question 9

Multiple Choice

The example that the heterozygote HbS HbA, one sickle-cell allele and one normal one, was maintained in some populations as the fittest phenotype for a malarial environment demonstrates


A) mutation.
B) genetic drift.
C) phenotypical adaptation.
D) recombination.
E) balanced polymorphism.

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