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单选题
野生型玉米的体细胞和生殖细胞中均存在淀粉，而基因Wx失活（突变为wx）后，wx wx纯合体细胞中不含淀粉，表现为果实皱缩。
确定纯合野生型植株中Wx突变为wx频率的最好方法是：（）
A
收集数百植株的玉米棒，计数皱缩果实的比例
B
对玉米叶片进行切片，计数没有淀粉粒的细胞所占比例
C
分别提取大田中每个玉米植株的基因组，对该基因PCR扩增后测序，计算突变序列所占比例
D
用碘液对花粉染色，计数未能着色的花粉所占比例
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更多 “单选题野生型玉米的体细胞和生殖细胞中均存在淀粉，而基因Wx失活（突变为wx）后，wx wx纯合体细胞中不含淀粉，表现为果实皱缩。 确定纯合野生型植株中Wx突变为wx频率的最好方法是：（）A 收集数百植株的玉米棒，计数皱缩果实的比例B 对玉米叶片进行切片，计数没有淀粉粒的细胞所占比例C 分别提取大田中每个玉米植株的基因组，对该基因PCR扩增后测序，计算突变序列所占比例D 用碘液对花粉染色，计数未能着色的花粉所占比例” 相关考题
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考题
单选题野生型玉米的体细胞和生殖细胞中均存在淀粉，而基因Wx失活（突变为wx）后，wxwx纯合体细胞中不含淀粉，表现为果实皱缩。
如果皱缩果实所占比例为0.0036%，则Wx突变为wx的频率为：（）A
0.18%B
0.36%C
0.72%D
0.6%
考题
多选题Which three benefits does WX Central Management System (WX CMS) software offer WX administrators?（）(Choose three.)ASupports up to 1500 WX devices.BSimplifies software deployment of WX devices.CProvides a scheduler for device management tasks.DSupport is offered for both UNIX- and Windows-based products.EProvides views of the immediate status of deployed devices and the service tunnels.
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