In Humans,the Genes for Red-Green Colour Blindness (R = Normal,r

Multiple Choice

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

A) HR/hr
B) Hr/hr
C) hr/hR
D) Hr/hR
E) HR/Hr