AS Biology - Evolution topic. Hardy-Weinberg Equilibrium 

AS Biology - Evolution topic. Explanation of the Hardy Weinberg Principle. What it means in terms of allele frequencies for a population to be at Hardy-Weinberg equilibrium. How allele frequencies are used to calculate genotype frequencies, resulting in the Hardy Weinberg equation p2 +2pq + q2 = 1. Explanation of the factors that determine if H-W equilibrium is possible.