Read the passage given below and answer the following question. According to Hardy-Weinberg principle, the allele frequencies in a population are stable and remain constant through generations. The gene pool (total genes and their alleles in a population) remains a constant. This is called genetic equilibrium .Sum total of all the allelic frequencies is 1.

Which among the following is the equation that represents Hardy-Weinberg equilibrium?

(p + q)2 or p2 + 2pq + q2 = I (p + q)2 or p+ 2pq + q2 = 1 (p + q)2 or p2 + 2pq + q2 = 0 (p + q)2 or p2 + 3pq + q2 = I

(p + q)2 or p2 + 2pq + q2 = I

P2+2pq+q2=1. This is a binomial expansion of (p+q)2.