A. Two unaffected individuals can have affected offspring.
B. An unaffected female can produce unaffected sons.
C. Males are more likely to be affected than females.
D. Both males and females can be affected.
参考答案:
C
本题详细解析:
In the pedigree, only males are shown to inherit the disorder. The single female with the disorder is a mate of a male in generation II and not an offspring of the original parents. So, according to the pedigree, males are more likely than females to be affected, which suggests that the trait is X-linkage recessive.
Two unaffected individuals can have affected offspring (Choice A), an unaffected female can produce unaffected sons (Choice B), and both males and females can be affected (Choice D) when a trait is transmitted through either an X-linked recessive or autosomal recessive pattern of inheritance.
