Biology

The correct answer is: A.Migration introduces new alleles.

Explanation:

No migration is one of the conditions for Hardy-Weinberg equilibrium because migration (gene flow) can introduce new alleles or change the frequencies of existing alleles in a population. This disrupts the equilibrium by altering the genetic makeup of the population, making it deviate from the assumption of constant allele frequencies.

The other options are incorrect because:

B.Migration prevents random mating: Migration itself doesn't prevent random mating. Random mating is a sepa...