一个DNA分子经过3次复制后，新的DNA分子中保留有原来母链的DNA占(

一个DNA分子经过3次复制后，新的DNA分子中保留有原来母链的DNA占( )

A.1/2 B.1/4 C.1/8 D.1/16

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一个DNA分子经过3次复制后，新的DNA分子中保留有原来母链的DNA占(

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