Modern population genetics was proposed by

Modern population genetics was proposed by Hardy and Weinberg.
The Hardy-Weinberg equation is a mathematical equation that can be used to calculate the genetic variation of a population at equilibrium. In 1908, G. H. Hardy and Wilhelm Weinberg independently described a basic principle of population genetics, which is now named the Hardy-Weinberg equation.
They discovered that in an infinitely large population that mates randomly according to Mendel's laws, the frequencies of the genotypes obtained from two alleles remain constant through generations.