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Gaokao Biology Practice Question

1.果蝇体细胞含有8条染色体。下列关于果蝇体细胞有丝分裂的叙述,错误的是()

  1. A.在间期,DNA进行半保留复制,形成16个DNA分子
  2. B.在前期,每条染色体由2条染色单体组成,含2个DNA分子
  3. C.在中期,8条染色体的着丝点排列在赤道板上,易于观察染色体
  4. D.在后期,成对的同源染色体分开,细胞中有16条染色体

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