Hardy-Weinberg law
Basic concept in population genetics discovered independently in 1908 by the great English mathematician G(odfrey) H(arold) Hardy and Wilhelm Weinberg, a physician in Germany.
The Hardy- Weinberg law is a cornerstone of clinical genetics.
(In technical terms, the Hardy-Weinberg law relates the gene frequency to the genotype frequency and so can be utilized, for example, to determine allele frequency and heterozygote frequency when the incidence of a genetic disorder is known)