Height (Tallness) in Humans Is a Polygenic Trait

Multiple Choice

Height (tallness) in humans is a polygenic trait. Assume the following: There are 4 genes that determine height (Aa, Bb, Cc, Dd) . Each dominant allele adds 2 inches of height to an individual. The height of the recessive individual (aa, bb, cc, dd) is 5 feet. What is the height of a person with the genotype (AA, Bb, cc, DD) ?

A) 5?4²
B) 5?10²
C) 5?8²
D) 6?6²
E) 5?6²