18th November 2019

wikipedia
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What is a balancing selection?

Balancing selection refers to a number of selective processes by which multiple alleles (different versions of a gene) are actively maintained in the gene pool of a population at frequencies larger than expected from genetic drift alone. In this way genetic polymorphism is conserved.

Similarly, you may ask, how is sickle cell anemia an example of balanced polymorphism?

The genetic selective scenario in which a heterozygote for two alleles of a gene has an advantage over either of the homozyous states is called "balanced polymorphism". A key concept to keep in mind is that the selection is for sickle cell trait. A common misstatement is that malaria selects for sickle cell disease.

What is transient polymorphism?

transient polymorphism The presence in a population at a particular gene locus of alternative alleles in which one is progressively replaced by another, in contrast to a balanced polymorphism where the alleles are in equilibrium with each other.

What is polymorphism in molecular biology?

Polymorphism, in biology, a discontinuous genetic variation resulting in the occurrence of several different forms or types of individuals among the members of a single species. A discontinuous genetic variation divides the individuals of a population into two or more sharply distinct forms.
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