Continuing with the snapdragon project from the in class exercise, the next few questions will be working towards performing a chi-square test on if the population is at hardy-weinberg equilibrium. we must first determine the observed genotype frequencies and expected genotype frequencies if the population is at equilibrium.
recall you are characterizing wild snapdragon plants. snapdragons show incomplete dominance in their flower color, with the rr genotype being red, rw genotype being pink, and ww genotype being white. in a population sample of 125 snapdragons, there are 52 white flower, 47 pink flower, and 26 red flower.
a) in class, you determined the r allele frequency. what is the allele frequency of w?
b) in class, you determined the observed genotype frequency of rw. what is the observed genotype frequency of ww?
c) in class, you determined the observed genotype frequency of rw. what is the observed genotype frequency of rr?
d) still considering the wild snapdragon plant study, recall you counted 52 white snapdragons, 47 pink snapdragons, and 26 red snapdragons. in class you determined the expected genotype frequency of ww if the population is at hardy-weinberg equilibrium. now, determine the expected genotype frequency of the rw genotype if the population is at hardy-weinberg equilibrium.
e) still considering the wild snapdragon plant study, recall you counted 52 white snapdragons, 47 pink snapdragons, and 26 red snapdragons. in class you determined the expected genotype frequency of ww if the population is at hardy-weinberg equilibrium. now, determine the expected genotype frequency of the rr genotype if the population is at hardy-weinberg equilibrium.
f) using your observed and expected genotype numbers as percentage values (numbers out of 100), determine a chi square value for the hypothesis that the population is at hardy-weinberg equilibrium.