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科学家发现人类的Y染色体正在不断缩短,未来的男性将何去何从?
染色体是细胞里的遗传物质聚合体,由蛋白质和DNA构成;DNA其实就是一种具有双链结构的大分子聚合物,携带着生物体必需的遗传信息;基因是带有 ...
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