精选华师大版初中科学九年级下册第五章 生物的遗传和变异1 生物的遗传知识点练习含答案解析第二.docx

1、精选华师大版初中科学九年级下册第五章 生物的遗传和变异1 生物的遗传知识点练习含答案解析第二2019年精选华师大版初中科学九年级下册第五章 生物的遗传和变异1 生物的遗传知识点练习【含答案解析】第二十七篇第1题【单选题】基因A为显性，基因a为隐性，则Aa与Aa杂交，其子代性状表现可能有几种？( )A、一种B、两种C、三种D、四种【答案】：【解析】：第2题【单选题】已知有耳垂由显性基因A控制，无耳垂由隐性基因a控制在下面基因的传递过程图解中，的基因组成和性状分别是( )A、Aa 有耳垂B、Aa 无耳垂C、!-cke_protectedC%3C!%2D%2D%5Bif%20gte%20mso%20

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