Biology

The correct answer is B. No natural selection.

The condition that must be met for Hardy-Weinberg equilibrium is no natural selection.

Hardy-Weinberg equilibrium is a principle in population genetics that describes the theoretical state of a population in which allele frequencies remain constant from generation to generation. It serves as a null model against which deviations in allele frequencies can be measured, indicating the presence of evolutionary forces.

In order for a population to be in Hardy-Weinberg equilibrium, several conditions must be met. These conditions are:

1. No natural selection: The absence of differential survival or reproductive success based on specific traits. In other words, all individuals in the population have equal fitness regardless of their genotype.

Option A, an extremely small population size, violates the condition of the Hardy-W...