In a stable population, for a gene with two alleles, 'A' (dominant) and 'a' (recessive), the frequency of ' A′=p the frequency of ' a ' =q, According Hardy-Weinberg equation: p2+2pq+q2=1 where p2= Frequency of A (homozygous dominant) individuals q2= Frequency of aa (homozygous recessive) individuals 2pq= Frequency of Aa (heterozygous) individuals. ∴2pq( frequency of heterozygote )=2×0.6×0.4=0.48