Which of the following is NOT a condition for Hardy-Weinberg Equilibrium?

The correct answer is: Gene flow

The 7 conditions for Hardy Weinberg equilibrium are:
1. Mutation is not occurring
2. Natural selection is not occurring
3. The population is infinitely large
4. All members of the population breed
5. All mating is totally random
6. Everyone produces the same number of offspring
7. There is no migration in or out of the population
Hence, (d) is the correct answer as gene flow should not be occurring.

According to the Hardy-Weinberg equilibrium, if no unfavorable influences exist, genetic variation in a population will remain stable from one generation to the next. Furthermore, because genotype and allele frequencies are in equilibrium when mating is random in a large population with no disruptive influences, the rule predicts that they will remain constant.
• When a population reaches Hardy-Weinberg equilibrium for a gene, it is not evolving, and allele frequencies do not alter over time.
• The five fundamental Hardy-Weinberg assumptions are that there is no mutation, random mating, no gene flow, an infinite population size, and no selection.
• A gene's population may evolve (the allele frequencies of the gene may change) if the presumptions are not true for that gene.