Red-green color blindness is a sex-linked recessive trait. A woman with normal vision (whose father was colorblind) marries a man with normal vision. What are the chances that they'll have a child with normal vision?

A certain form of muscular dystrophy is inherited as a sex-linked, recessive gene. Jack has muscular dystrophy. (But neither of his parents has this disease). Jane, Jack’s wife, does not have muscular dystrophy, but her father does. What are the genotypes of Jack and Jane?

A certain form of muscular dystrophy is inherited as a sex-linked, recessive gene. Jack has muscular dystrophy. (But neither of his parents has this disease). Jane, Jack’s wife, does not have muscular dystrophy, but her father does. What fraction of their kids would you expect to have muscular dystrophy?

A certain form of muscular dystrophy is inherited as a sex-linked, recessive gene. Jeff does not have muscular dystrophy. Jill, Jeff’s wife, does not have muscular dystrophy, but her father does. What fraction of their daughters would you expect to have muscular dystrophy?

A certain form of muscular dystrophy is inherited as a sex-linked, recessive gene. Jeff does not have muscular dystrophy. Jill, Jeff’s wife, does not have muscular dystrophy, but her father does. What fraction of their sons would you expect to have muscular dystrophy?