But in this area our models and equations are sometimes more precise than the ones used in population genetics.
Examples are the analysis of genetic drift and the analysis of the genetic variance.
It has been known in population genetics for quite some time that a finite population converges to a single genotype, even if selection is not applied. The mutation rate is assumed to be negligible. Other important contributions have been made since 1960 to the theory of immediate or long term response to selection. I will only mention two of those here. Verrier, E., J. J. Colleau, and J. L. Foulley, 1991.