A man and a woman have 2 child The parents are each heterozy

A man and a woman have 2 child. The parents are each heterozygous for a different disease-associated allele of the xeroderma pigmentosum group A gene (XPA). What is the probability that either of their children will be affected with the disease? (a) 0% (b) 25% (c) 50% (d) 75% (e) none of the above

Solution

b)25% because the percent both of them will get the disease combined is 50% so for each child=50/1=25%