Volpe's Understanding Evolution 7th Edition by Peter Rosenbaum

Exercise 6

In the expression, p²+ 2pq + q²= 1, what does 2pq represent?
A) The frequency of the recessive allele.
B) The frequency of the dominant allele
C) The frequency of the homozygous dominant genotype
D) The frequency of the homozygous recessive genotype.
E) The frequency of the heterozygous genotype.