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【单选题】
家蚕结黄茧和白茧由一对等位基因 Y、y控制,并受另一对等位基因I、i影响。当基因I存在时,基因Y的作用不能显现出来。现有下面两组杂交实验,下列分析错误的是( )
A.
基因 Y与基因I位对同源染色体上
B.
实验二两亲本的基因型可能是 YYIi×YyIi
C.
若实验一的 F2中结黄茧个体自由交配，后代中纯合子占5/9
D.
若实验一的 F1与F2中结白茧杂合子杂交，理论上后代结白茧家蚕中纯合子占5/12
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【单选题】Part II Listen to a long conversation and choose the best answer to each question you hear. (2 points for each question) Long conversation.mp3: 6.mp3:
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