2020-2021学年生物冀少版八年级下册随堂检测（4）遗传
※题型：单选题※知识点：单选题※试题难度：中等<br>下列不属于人的性状的是( )<br>A.皮肤的颜色 B.血型 C.惯用右手 D.龋齿<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/1476931dffa44abe81a38cc76b11076a/B4A95E0049EF7D88C3ABD6FDD51A35AE.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/a5e3993d4970402996acc6a5fdc39fd0/FA97CED70FECC0564098BABC8CD6546F.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列四组生物性状中,不属于相对性状的是( )<br>A.<img src="https://picture2.zhihuicn.com/testImage/2/2020/1/4/2C7B2F7D3B57DABC584CFED5E2B26504.png"><br>B.<img src="https://picture2.zhihuicn.com/testImage/2/2020/1/4/0D9499DDDB952B94FA07BC549C750B6A.png"><br>C.<img src="https://picture2.zhihuicn.com/testImage/2/2020/1/4/8354642D5675AA4E7F9114B834EB0F21.png"><br>D.<img src="https://picture2.zhihuicn.com/testImage/2/2020/1/4/98E241AF644A2985CF2E0B4EBFE4AA83.png"><br><br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/0d548522ab084044bbcfdc414a0808b0/76900E09FAB5EBA344B8EA84E844FF07.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/aa4812bf20024e0b85540282184beaf7/EB222EE35C3A57D9F50928F4CFF9E14C.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>性状的遗传实质上是亲代通过生殖过程把基因传递给子代,在这个过程中起“桥梁”作用的是( )<br>A.精子和卵细胞 B.体细胞<br>C.染色体 D.基因和性状<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/4e5c6fd0218e4d58b29a2f0487cdb4f3/DA50F910BECBBBA4AAB35D7A1AB24524.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/ccb727026c2b444187741f3502ffb4ab/2917DEAC7411B8E99BA2F0F2A994FDF5.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>生物体细胞中的每一对染色体( )<br>A.有的来自父方,有的来自母方 B.都来自父方<br>C.一条来自父方,一条来自母方 D.都来自母方<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/f25bafc4b2ca4fe09578ce0f92e31160/06CA09E70C17EF8BA2D3B8C70D693953.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/dfb7083925674f7e8c23d0d0d67276b5/8A6B9053034D4E8286F0A7AE44FD732C.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>通常用大写字母表示显性基因,小写字母表示隐性基因,下列表现出隐性性状的是( )<br>A.DD B.EE C.Dd D.bb<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2019/1af7d6baf5ce4d3480286a08ec4a660b/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2019/6fdb9cfee4a446be8c6bf5efae0e4c02/6EEF1767299E3A2C3576A22DC36142B6.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>某对夫妇第一胎生了个女孩,在政策允许的范围内准备生第二胎,那么第二胎( )<br>A.一定是男孩<br>B.一定是女孩<br>C.生男孩的可能性较大<br>D.生男生女的概率各占一半<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/eed1dce967934fd6a0809d6a736bd65b/D9A7E0722DAB5479A60928D5B8864BC6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/b81cc3ef9b6747e7b09f47d977c09a18/81861E47FD0115D8C6D73B49B5D27D2B.png"><br><br>※题型：读图填空题※知识点：读图填空题※试题难度：较易<br>下图是染色体和DNA关系图,请看图作答。<img src="https://picture1.zhihuicn.com/2/AFCD83A5D0C0226D7E7FB78F27C0E43D.png"><br>style="VERTICAL-ALIGN:middle">1.图中A是染色体,它是由和组成。2.在C上,有许多具有控制生物性状的小片断叫做。<br>答案<br><img src="https://picture1.zhihuicn.com/Answer/2/9/7BB1BF2B5C3545C1580396A1C54A7085.png"><br>解析<br><img src="https://picture1.zhihuicn.com/Explain/2/9/F1BFC8985DA9229FB87BC816435ABAD1.png"><br><br>
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