3) The most common form of color-blindness - red/green color-blindness - is an X-linked recessive trait affecting around 8% of the male population in the US. What proportion of females would you expect to have this trait?

0.08, because for an X-linked trait the genotype frequencies among males are the same as the allele frequencies. Therefore, you would expect about q2 = 0.0064 (or 0.64%) of the female population to be affected and 2pq =0.147 (or 14.7%) of the female population to be carriers.

Explanation:

before vowels deuter-, word-forming element meaning "second," from Late Latin deutero-, from Greek deuteros "next, second," a word of uncertain origin.