2020-2021学年高二生物北师大版（2019）必修二随堂检测（8）受精作用
※题型：单选题※知识点：单选题※试题难度：较易<br>下图是某生物(体细胞的染色体数目=2n)的受精作用示意图。精细胞、卵细胞和受精卵中的染色体数目分别为( )<img A.2n、2n和2n B.2n、2n和n<br>C.n、n和2n D.n、n和n<br>答案<br><img src="https://picture2.zhihuicn.com/answer/1/9/2017/9251428c90284e93acaa615af5cb2013/F3FFF02E67737AECAA5F9376DCA7D618.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/1/9/2017/6b30689a7a6b48f9b10cabaf40fae131/319F5355893E9A02878599B900845778.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列卵细胞中已完成受精的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/1/2020/12/29/97F195A77912A2C92DA06858682B67E4.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/1/2020/12/29/24188F904AF13B672DEF954C13A2C3FF.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/1/2020/12/29/D91F74D47288673126310878F0F735F7.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/1/2020/12/29/F04B908F318AD634EFCEFC98ABB2C25C.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/1/9/2020/8cb3ca1a8d014184868d5610d649e8c1/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/1/9/2020/964099beda65489789fd91e4d008e92b/961BC1AC5EFC050A110F64F8D54EC3F2.png"><br><br>
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