For the genetic trait of interdigital hair (hair between your knuckles), this phenotype is controlled by one gene. In a population, you determine that the frequency of the alleles is 0.55 H and 0.45 h, with HH being dominant and hairy. If the observed genotype ratio is 0.25 HH, 0.55 Hh and 0.2 hh, is this population at Hardy Weinberg equilibrium? (Show your work to do this calculation). If not, what are the Hardy-Weinberg genotype ratios?

If the population is not at equilibrium, what are three different reasons that it might not be?