In humans, the allele for Duchenne muscular dystrophy (d) is recessive to the normal allele (D). This is a sex-linked trait found on the X chromosome. A
woman who does not have Duchenne muscular dystrophy has four children: a
normal son, a son with Duchenne muscular dystrophy, and two normal
daughters. The father does not have Duchenne muscular dystrophy. What is the
genotype of each member of the family? If a person has more than one
genotype possible, you must list each possibility!