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Both negative-frequency dependent selection and heterozygote advantage can lead to a stable polymorphism. Answer the following...

Both negative-frequency dependent selection and heterozygote advantage can lead to a stable polymorphism. Answer the following questions.

A) Of the two mechanisms, which is guaranteed to produce a stable polymorphic equilibrium? Which is not? Explain. (A polymorphic equilibrium is one in which both alleles are present).

B) Of the two mechanisms, which could apply to bacteria? Which could not?

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Answer #1

A) Negative frequency dependent selection may the most powerful selective force to main natural polymorphism.It has the potential to maintain polymorphism with in population because relatively rare variants have selective advantage over more common variants and thus tend to increse in frequency and avoid local extinction.Hetrozygote advantage selection os not considered as a stable measure to maintain polymorphism.

B)Negative frequency dependent slection is the most applicable method in case of bacteria and hetrozygous advantage selection is not applicable for bacteria

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