A10-month-old infant has begun to take his first steps and his mother has brought him for assessment because of swelling in his ankles and knees. the mother also states that he was eager to walk but has now regressed and cries when she tries to encourage it. the clinician should:

Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human x chromosome. the patients have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. they rarely live past their twenties. how likely is it for a woman to have this condition? a) women can never have this condition.b) one-fourth of the daughters of an affected man would have this condition.c) one-half of the daughters of an affected father and a carrier mother could have this condition.d) only if a woman is xxx could she have this condition.