Hardy Weinberg principle states that the allele frequencies in a population are stable and is constant from generation to generation in absence of other evolutionary influences like gene migration or gene flow, genetic drift, mutation, genetic recombination and natural selection. [1 mark]
Hardy-Weinberg equilibrium equation
p²+2pq+q² = 1
where,
p² = frequency of homozygous dominant genotype
2pq = frequency of heterozygous genotype
q² = frequency of homozygous recessive genotype
[1 mark]