大学职业资格刷题搜题APP
下载APP
课程
题库模板
WORD模板下载
EXCEL模板下载
题库创建教程
创建题库
登录
创建自己的小题库
搜索
【单选题】
1万年前,科罗拉多大峡谷中的松鼠(原种群中黑毛基因A的基因频率为50%)被一条河流分隔成两个种群,两个种群现在已经发生明显的分化。研究人员指出,经过长期演化两个种群可能形成两个物种,下列说法错误的是( )【图片】
A.
①②③④⑤⑥为生物进化提供原材料
B.
b 表示自然选择过程 ,是不定向的
C.
若环境变化后,种群中基因型为 AA 、 Aa 的个体数量在一年后各增加 20% ,基因型为 aa 的个体数量减少 20% ,则一年后 a 的基因频率为5/11
D.
没有D
题目标签:
基因频率
大峡谷
科罗拉多大峡谷
如何将EXCEL生成题库手机刷题
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
收藏
举报
参考答案:
举一反三
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s surface, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
its shapes are constantly changing
B.
it contains approximately 14 million tons of rock
C.
its eruptions have increased in recent years
D.
it is being eroded by toxic waste and pollutants
查看完整题目与答案
【简答题】库克苏克大峡谷有哪些项目?
查看完整题目与答案
江苏旅游知识竞赛考试题目
【单选题】下图为“科罗拉多大峡谷成因示意图”,①~⑤表示了它的形成过程。读图完成下列各题。 地壳运动导致峡谷形态变化,一般观测峡谷形态变化情况的技术手段是()
A.
全球定位系统
B.
雷达系统
C.
地理信息系统
D.
遥感技术
查看完整题目与答案
【单选题】下列关于美国科罗拉多大峡谷说法错误的是()
A.
是世界七大奇观之一
B.
组成的岩石以红色为主
C.
被誉为“活的历史教科书”
D.
位于澳大利亚东部沿海
查看完整题目与答案
【判断题】基因频率是指一个群体内某特定基因座的某一等位基因占该基因座等位基因总数的比率。
A.
正确
B.
错误
查看完整题目与答案
【单选题】A基因频率为p,a基因频率为q,则基因型频率为( )。
A.
p=D+1/2H q=1/2H+R
B.
p2+q2
C.
p+q
D.
p2+2pq+q2
查看完整题目与答案
【简答题】基因频率与基因型频率
查看完整题目与答案
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s surface, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
Astronomy
B.
Botany(植物学)
C.
Geology
D.
Chemistry
查看完整题目与答案
【多选题】改变基因频率的因素有哪些
A.
突变
B.
杂交
C.
迁移
D.
随机遗传漂变
查看完整题目与答案
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s surface, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
it was caused by some ancient convulsion
B.
its presence is an embarrassment to the state of Colorado
C.
it looks like an injury on the Earth’s surface
D.
it has caused many visitors to injure themselves
查看完整题目与答案
相关题目:
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s surface, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
its shapes are constantly changing
B.
it contains approximately 14 million tons of rock
C.
its eruptions have increased in recent years
D.
it is being eroded by toxic waste and pollutants
查看完整题目与答案
【简答题】库克苏克大峡谷有哪些项目?
查看完整题目与答案
江苏旅游知识竞赛考试题目
【单选题】下图为“科罗拉多大峡谷成因示意图”,①~⑤表示了它的形成过程。读图完成下列各题。 地壳运动导致峡谷形态变化,一般观测峡谷形态变化情况的技术手段是()
A.
全球定位系统
B.
雷达系统
C.
地理信息系统
D.
遥感技术
查看完整题目与答案
【单选题】下列关于美国科罗拉多大峡谷说法错误的是()
A.
是世界七大奇观之一
B.
组成的岩石以红色为主
C.
被誉为“活的历史教科书”
D.
位于澳大利亚东部沿海
查看完整题目与答案
【判断题】基因频率是指一个群体内某特定基因座的某一等位基因占该基因座等位基因总数的比率。
A.
正确
B.
错误
查看完整题目与答案
【单选题】A基因频率为p,a基因频率为q,则基因型频率为( )。
A.
p=D+1/2H q=1/2H+R
B.
p2+q2
C.
p+q
D.
p2+2pq+q2
查看完整题目与答案
【简答题】基因频率与基因型频率
查看完整题目与答案
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s surface, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
Astronomy
B.
Botany(植物学)
C.
Geology
D.
Chemistry
查看完整题目与答案
【多选题】改变基因频率的因素有哪些
A.
突变
B.
杂交
C.
迁移
D.
随机遗传漂变
查看完整题目与答案
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s surface, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
it was caused by some ancient convulsion
B.
its presence is an embarrassment to the state of Colorado
C.
it looks like an injury on the Earth’s surface
D.
it has caused many visitors to injure themselves
查看完整题目与答案
参考解析:
题目纠错 0
发布