The Study of Sickle-Cell Anemia and Its Relation to Malarial

question 6

Multiple Choice

The study of sickle-cell anemia and its relation to malarial environments demonstrates that

• A) homozygotes lack the capacity to digest lactose.
• B) changes in cultural adaptation can result in changes in the selective pressures on a human population.
• C) selection removes recessive alleles from the gene pool faster than it does dominant alleles.
• D) heterozygotes are not as selectively fit as are dominant homozygotes.
• E) natural selection improves a gene pool by wiping out deleterious alleles.

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