2020-2021学年北师大版八年级上册生物课堂小测6.20.1遗传和变异现象
※题型：单选题※知识点：单选题※试题难度：较易<br>下列各组性状中,属于相对性状的是( )<br>A.水稻的抗病和不抗病<br>B.豌豆的圆粒和黄粒<br>C.狐的短尾和猫的长尾<br>D.番茄果实的红色和苹果果实的黄色<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/8045ff60919b40c4ae34dc3e94434cb9/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br>略<br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列性状中属于相对性状的是( )<br>A.狗的长毛与猫的短毛 B.人的身高与体重<br>C.马的栗色毛与白色毛 D.棉花的细绒与长绒<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/f388836cfaf94c889bf839a4662bde7e/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/48bcc7741cea4f10ab41aff2938edb13/3EC9CC61AEFDCCACA5AAD4DD143408AA.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>在日常生活中,人们常说“血缘关系”。这里的“血缘”实际上是指( )<br>A.遗传 B.血浆 C.血细胞 D.血型<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/2bbe9abefd594fa3ba212e6bdc0cba50/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/772c6cc2f3f04d35b419573d940a7a37/06CD4A0A3AD01D63CB02DAB5CDCE3E05.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>谚语“种瓜得瓜,种豆得豆”和“一树结果,酸甜各异”依次描述了生物的什么现象( )<br>A.变异 遗传<br>B.遗传 变异<br>C.遗传 遗传<br>D.变异 变异<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/5981be5e693d4fa59fc69733f413a349/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/ef7bf45928e04514ab299da9a8db357e/9E0AAB85C325DA45E4242DC0D5AEE38D.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>“世界上没有完全相同的两片树叶”说明生物界普遍存在( )<br>A.生长现象 B.繁殖现象 C.遗传现象 D.变异现象<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/a4e38afb40f849edb4f45200a6aee9dc/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/afaaa32eb6c44390a612403f3ac137d5/656A897E953B3E7AE4599642FE6CF2AB.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>有的人是单眼皮,有的人是双眼皮;有的人色觉正常,有的人是色盲患者。上述这些形态、生理特征叫做( )<br>A.遗传 B.变异 C.基因 D.性状<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/5599743227b248d4b511bd18c66914f0/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/e0e429f11e5d446c9591a7a94e40f1b2/0324285F89E7A53AAC4183B590549E78.png"><br><br>
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