AP BIOLOGY

Detailed explanation-1: -Genetic polymorphism in a population is a widespread phenomenon in nature that is potentially maintained by balancing selection or by a selection–migration balance [13, 14].

Detailed explanation-2: -Sickle Cell Disease It illustrates balanced polymorphism because carriers are resistant to malaria, an infection by the parasite Plasmodium falciparum that causes cycles of chills and fever.

Detailed explanation-3: -Balanced Polymorphism Hence the relatively high frequency of the allele in malarial regions. When natural selection favors heterozygotes over both homozygotes, the result is balanced polymorphism. It accounts for the persistence of an allele even though it is deleterious when homozygous.

Detailed explanation-4: -What is Balanced Polymorphism? In balanced polymorphism, two different genes are maintained in a population of one species or organism. This happens because individuals that carry both versions of polymorphic genes are relatively fit or are more able to survive than those having two copies of either version alone.