The Example That the Heterozygote Hb^S Hb^A, One Sickle-Cell Allele

question 9

Multiple Choice

The example that the heterozygote Hb^S Hb^A, 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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