In a population, autosomal dominant-recessive inheritance can be expressed by Hardy–Weinberg. The simple algebraic expression is: p2+2pq+q2=1 where, p is the frequency of A = 0.6 q is the frequency of a = 0.4 2pq is the frequency of Aa (heterozygous individuals) =2×0.6×0.4=0.48 Thus, the expected frequency of heterozygous individuals = 48%