16) A man and a woman walk into a genetic counselor\'s office. The woman has a b

Question

16) A man and a woman walk into a genetic counselor's office. The woman has a brother who has been diagnosed with hemophilia, a sex-linked condition. The man has no family history of the illness. They are considering having children. Which of the following statements are appropriate and correct things to say to this couple? 1-The chance of any given child from this couple having hemophilia is approximately 50% 2-Assuming the woman and her afflicted brother have the same mother, the chance of a male child from this couple having hemophilia is approximately 50% 3-The chance of a female child from this couple having hemophilia is approximately 50% 4-An egg donor might be a good idea, if they are open to the idea 5-A sperm donor might be a good idea, if they are open to the idea 6-The two should probably adopt, and not spread their bad genes A. 1, 2, and 6 B. 1 and 5 C. 2 and 4 D. 1-6, all statements are correct and appropriate E. None of 1-6 are correct and appropriate

Explanation / Answer

The right answer is

C. 2 and 4

Because haemophilia is a sex linked recessive trait. As the woman's brother was affected from the disease, it clearly indicates that his mother was a carrier of this disease. And there are 50% chances that the woman can also be a carrier. So, her male child could only be diseased. As the man is not having any family history of haemophilia, there is no need for sperm donor. And every organism has right to have their own babies. So, I don't agree with statement number 6.

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