Question

Why is a balanced frequency of different alleles of a gene in a population more useful for the survival of a population facing environmental changes?

Answer 1

For a trait conditioned via alleles, as an instance, A and a, a balanced frequency among the alleles A and b is more positive for survival. as an example, in an environmental scenario in which the aa homozygous phenotype will become incompatible with life, the presence of a huge variety of AA and Aa people will bring about a better risk of survival for the species. every other example is an environmental scenario wherein the dominant phenotype will become incompatible with life; in this situation, the existence of heterozygous and recessive homozygous people in huge sufficient numbers may be essential for the survival of the species.