一对表现正常的夫妻均含有2条异常染色体,生育一个不含异常染色

一对表现正常的夫妻均含有2条异常染色体,生育一个不含异常染色体的正常孩子。下列

   叙述错误的是

   A.这对夫妻各自体内的基因总数有可能未发生变化

   B.这对夫妻各自含有的两条异常染色体可能是同源染色体

   C.这对夫妻再生一个染色体正常孩子的概率为1/16

   D.这对夫妻再生一个有两条异常染色体的孩子可能表现正常

答案

B

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