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Gaokao Biology Practice Question

6.依据鸡的某些遗传性状可以在早期区分雌雄，提高养鸡场的经济效益。已知鸡的羽毛性 状芦花和非芦花受1对等位基因控制。芦花鸡和非芦花鸡进行杂交，正交子代中芦花鸡和非 芦花鸡数目相同，反交子代均为芦花鸡。下列分析及推断错误的是（）

  1. A.正交亲本中雌鸡为芦花鸡，雄鸡为非芦花鸡
  2. B.正交子代和反交子代中的芦花雄鸡均为杂合体
  3. C.反交子代芦花鸡相互交配，所产雌鸡均为芦花鸡
  4. D.仅根据羽毛性状芦花和非芦花即可区分正交子代性别

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