Answer to Question #149231 in Genetics for Kate

Question

8. A heterozygous brown-eyed human female who is a carrier of color blindness marries a blue-eyed male who is not color-blind. Color blindness is a sex (X)-linked trait. Assume that eye color is an autosomal trait and that brown is dominant over blue. What is the probability that...
a) they will have a child with brown eyes?
b) they will have child that is color blind?
c) they will have a blue eyed, colorblind female? d) their first 2 children will be colorblind?

9. Imagine that a newly discovered, recessively inherited disease is expressed only in individuals with type O blood, although the disease and blood group are independently inherited. A normal man with type A blood and a normal woman with type B blood, both of whom are heterozygous with respect to the disease gene, already have one child with the disease. The woman is now pregnant for a second time. What is the probability that the second child will also have the disease?

Answer 1

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