What is one condition that must be met for a population to be in genetic equilibrium? a. there is nonrandom mating. b. there is a large amount of gene flow. c. there is no genetic drift. d. there is a high mutation rate.

C. There is no genetic drift

Explanation:

A population is said to be in genetic equilibrium when the genetic variation of a population remains constant over many generations.

For a population to remain in genetic equilibrium it is necessary that external factors that disturb the equilibrium should not be present.

The external factors that are responsible for disturbing the genetic equilibrium are mutations, non-random mating, genetic drift and gene flow.

Genetic drift occurs when due to a chance event the allele frequency of a population either increases or decreases and this is usually common in small populations.

Thus, genetic drift should not occur so that the population can be in genetic equilibrium.

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

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