Question

The genes for sex-linked traits are carried on either the X or Y chromosome. Duchenne muscular dystrophy (DMD) is a recessive, sex-linked disease that is carried on the X chromosome. A woman with DMD and a man without the disease have a child. Which statement best describes the likelihood of the disease passing to their child?

Answer 1

A.) There is a 100 percent chance that their daughter will have the disease.
B.) There is a 50 percent chance that their son will have the disease.
C.) There is a 50 percent chance that their daughter will have the disease.
D.) There is a 100 percent chance that their son will have the disease.

Answer 2

Use this to help answer your question: http://www.nlm.nih.gov/medlineplus/ency/article/002051.htm

Answer 3

Which one do you think?

Answer 4

We can see that according to the given condition, male progeny will be affected by DMD. Since, 50% are males, the answer to your question will be?

Answer 5

b

Answer 6

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