D Question 30 2 pts A couple is seeking genetic advice from you on the probabili

Question

D Question 30 2 pts A couple is seeking genetic advice from you on the probabilities of their children inheriting hemophilia (a recessive disorder located on the X chromosome). The mother is a carrier, but the father does not have the disease. What are the possible phenotypes of their offspring? O All their kids regardless of gender will have hemophilia 0 100% chance for boys of having hemophilia and a 100% chance for girls of being carriers 100% chance for boys of having hemophilia and a 50% chance for girls of being carriers 50% chance for boys of having hemophilia and a 50% chance for girls of being carriers O O None of their kids will have hemophilia but they all will be carriers

Explanation / Answer

50% chance for boys of having haemophillia and a 50% chance for girls of being carriers.

Haemophillia is an X-linked recessive disorder. If a mother is carrier (heterozygous), then half of her sons will be affected i.e half of the sons will inherit the normal X chromosome and half will inherit the affected chromosome. 50% of the daughters will inherit one affected chromosome from mother and one normal chromosome from father and hence will be carriers.

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