A man and a woman, neither of whom show symptoms hemophilia, give birth to a hemophilic son. Which of the following most accurately describes the genotypes of the parents?
X(H) = normal / X(h) = hemophilia
a) mother: X(H) X(h) / father: X(H) Y
b) mother: X(H) X(H) / father: X(h) Y
c) mother: X(H) X(h) / father: X(h) Y
d) mother: X(H) X(H)/ father: X(H) Y
Answer: A
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