Question

Duchene muscular dystrophy, or DMD, is a recessive, X-linked disease. What would you expect to see in the offspring of a woman who has DMD and a man who does not have the disease?

All of their daughters and none of their sons would have the disease.

All of their sons and none of their daughters would have the disease.

None of their children would have the disease, but they would all be carriers.

Their daughters would have the disease and their sons would be carriers.

Answer 1

b
a sick woman in a x linked recessive disease would have both alleles of X with duchenne
therefore - she always "gives" a sick allele. here daughters will be carriers but none sick. all her sons will be sick

Answer 2

Thank you (: