In pan mixia, in the absence of migration, mutation, and selection the frequencies are a) constant in genotype and phenotype b) constant in genotype but variable in phenotype c)variable in genotype but constant in phenotype d)variable in both genotype and phenotype

option A - Constant in genotype and phenotype

Explanation:

Pan mixia is a situation in which an individual is just as likely to mate with another randomly chosen individual as any other in the population

In a situation as described in the question, sexual reproduction is limited to organisms of the same habitat, thus the genetic variation is reduced to the BAREST MINIMUM.

This results in Constancy in genotype and phenotype

sex cells are usually half's then they find another half and make a fertilize egg