下图是关于遗传知识的概念图,图中代码1、2、3、4依次为 (   )

下图是关于遗传知识的概念图,图中代码1234依次为 (  

A.染色体、双螺旋结构、遗传信息、基因

B.染色体、双螺旋结构、基因、遗传信息

C.细胞核、染色体、基因、遗传信息    

D.细胞核、基因、染色体、遗传信息

答案

A   DNA存在于染色体上,是双螺旋结构,贮存有遗传信息,上面的基因决定生物的性状。

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