2013-2014学年山东滕州滕西中学初二上期教学检测性状的遗传（带解析）

适用年级：初二
试卷号：356334

试卷类型：专题练习
试卷考试时间：2017/8/15

1.单选题(共3题)

基因D为显性，d为隐性，则Dd和Dd杂交，其子代基因组合有（　　）

A．一种

B．二种

C．三种

D．四种

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把高茎(E)豌豆与矮茎(e)豌豆杂交，子代中有高茎198株、矮茎189株，则其亲代的基因组合方式应是( )

A．EE×ee

B．Ee×ee

C．Ee×Ee

D．EE×Ee

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孟德尔用高豌豆和矮豌豆杂交，所得子一代全部是高豌豆，则亲代高豌豆的基因组成是（　　）

A．DD

B．Dd

C．dd

D．DD或Dd

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4.—The Internet plays an important role in our daily life， but many children spend too much time on computer games or movies online.

—That is bad for _______ teenagers' health ________ mind.

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5.—The month exam is coming. You should spend as much time as you can ______for it.

—Thanks for reminding me of it. I will.

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6.—The month exam is coming. You should spend as much time as you can ______for it.

—Thanks for reminding me of it. I will.

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试卷分析