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| 自别雌雄品种公鸡头顶白斑大，母鸡的小 | |||
| 鸡自别雌雄品种在养鸡业中，常利用伴性遗传规律，培育自别雌雄品种。这些品种的雏鸡在孵出后，可根据某些伴性性状，准确识别雌雄 | |||
| 鸡自别雌雄品种雏鸡在孵出后，可根据某些伴性性状，准确识别雌雄 | |||
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