A research team studies a large Eastern Milk Snake population in a metropark. In these snakes, gene T is one gene that affects the color pattern of the snake’s body. In 2004, the research team sampled a large number of snakes and determined the genotypes of the snakes for the T gene. They find the following genotype frequencies:
TT = 0.16
Tt = 0.20
tt = 0.64.
In 2005, the researchers re-sampled the population and determined that the frequency of the T allele is 0.4. One generation has passed.
Is the population in Hardy Weinberg Equilibrium for the T gene?:
A. Yes, because the square root of 0.16 = 0.4.
B. No, because the allele frequencies in 2004 do not match the allele frequencies in 2005.
C. No, because the TT genotype is likely being selected against in this population.
D. No, because there is selection occurring AND because the allele frequencies in 2004 do not match the allele frequencies in 2005.
E. Yes, because the genotype frequencies all add up to 1.
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