Question

The sickle cell allele is an example of which evolutionary force? how many base changes result in hemoglobin s? in which environment does possessing a sickle cell allele provide an advantage? what is the favored genotype?

Answer 1

The allele for sickle cell anemia would be an example of natural selection. In most situations, having crescent shaped red blood cells would hold less oxygen & would not be ideal. But in places that are affected by diseases like malaria, which attack red blood cells, having crescent blood cells minimizes the threat malaria can cause.

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