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Gaokao Biology Practice Question

5.(6分)已知果蝇的长翅和截翅由一对等位基因控制。多只长翅果蝇进行单对交配(每个 瓶中有1只雌果蝇和1只雄果蝇),子代果蝇中长翅:截翅=3:1.据此无法判断的是()

  1. A.长翅是显性性状还是隐性性状
  2. B.亲代雌蝇是杂合子还是纯合子
  3. C.该等位基因位于常染色体还是X染色体上
  4. D.该等位基因在雌蝇体细胞中是否成对存在

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