题干

如图是某对新婚夫妇体细胞染色体组成示意图,下列叙述正确的是(    )

A:图中染色体是由DNA和蛋白质组成的

B:图甲代表的是生殖细胞,因为染色体是成对存在的

C:这对新婚夫妇精子与卵细胞的受精作用发生在子宫内

D:如果该夫妇都是有耳垂(Dd),则他们的独生子女一定是有耳垂的。

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A

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