Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human X chromosome. The patients' muscles weaken over time because they have a lack or decreased levels of dystrophin, a muscle protein. Which of the following correctly predicts the probability of muscular dystrophy in female children?

Question

Quizplus · Accepted Answer

If a man with Duchenne muscular dystrophy (affected) has children with a carrier woman, there is a 50% chance (one-half) that their daughters will inherit the affected X chromosome from their father and the carrier X chromosome from their mother, resulting in the condition.

Duchenne Muscular Dystrophy Is a Serious Condition Caused by a Recessive