Biology Forums - Study Force

The relationship between malaria and the allele that produces sickle-cell anemia in humans is an example of balancing selection because

A)

malaria causes selection against individuals carrying the sickle-cell allele to be 100%.

B)

individuals that are heterozygous for the sickle-cell allele have a selective advantage against malaria over homozygous normal and homozygous sickle-cell individuals.

C)

malaria produces mortality rates of about 50% in both normal hemoglobin individuals and sickle-cell individuals.

D)

malaria kills 50% of children with the sickle-cell allele, and a similar proportion of adults with the allele.

E)

mortality is roughly equal between people dying from malaria and people dying from sickle-cell anemia.

B