試題詳解

28. Hypophosphatemia is inherited as an X-linked dominant. A woman without hypophosphatemia and a man with hypophosphatemia have a daughter. The daughter mates with a male without hypophosphatemia. What is the expected phenotypic ratio of their offspring?
(A) 3 unaffected females : 1 male with hypophosphatemia
(B) 2 unaffected females : 1 unaffected male : 1 male with hypophosphatemia
(C) 1 unaffected female : 1 female with hypophosphatemia : 1 unaffected male : 1 male with hypophosphatemia
(D) 1 unaffected female : 1 male with hypophosphatemia
(E) 1 female with hypophosphatemia : 1 unaffected male