In Humans, the Genes for Red-Green Color Blindness (R =

Multiple Choice

In humans, the genes for red-green color blindness (R = normal, r = color blind) and hemophilia A (H = normal, h = hemophilia) are both X-linked and only 3 map units apart.
-Suppose a woman has four sons, and two are color blind but have normal blood clotting and two have hemophilia but normal color vision.What is the probable genotype of the woman?

A) H R / h r
B) H r / h r
C) h r / h R
D) H r / h R
E) H R / H r