What effect would overfishing most likely have on a population of fish in a lake?

Answer is B.

Overfishing would lead to a bottleneck effect, as large numbers of fish are removed from a fish population. Population size has a major effect on the amount of genetic diversity. The greater the population, the greater genetic diversity. Due to overfishing, the population would become smaller, which would reduce genetic diversity. So the answer is B.

Yes it is hereditary because of the penis