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【简答题】
在一个常规饲养的实验小鼠封闭种群中，偶然发现几只小鼠在出生第二开始脱，以后终生保持无状态。为了解该性状的遗传方式，研究者设置了6组小鼠交配组合，统计相同时间段内繁殖结果如下。 (1)己知Ⅰ、Ⅱ组子代中脱、有性状均不存在性别差异，说明相关基因位于_____染色体上。 (2)Ⅲ组的繁殖结果表明脱、有性状是由____________基因控制的，相关基因的遗传符合____________定律。 (3)Ⅳ组的繁殖结果说明，小鼠表现出脱性状不是____________影响的结果。 (4)在封闭小种群中，偶然出现的基因突变属于____________。此种群中同时出现几只脱小鼠的条件是____________。 (5)测序结果表明：突变基因序列模板链中的1个G突变为A，推测密码子发生的变化是____(填选项前的符号)。 A．由GGA变为AGA  B．由CGA变为GGA  C．由AGA变为UGA  D．由CGA变为UGA (6)研突发现，突变基因表达的蛋白质相对分子质量明显小于突变前基因表达的蛋白质，推测出现此现象的原因是蛋白质合成。进一步研究发现，该蛋白质会使甲状腺激素受体的功能下降，据此推测脱小鼠细胞的_____________下降，这就可以解释表中数据显示的雌性脱小鼠的_____________原因。
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参考答案：
举一反三
【简答题】泉州是一座文化古城,具有1700多年的历史。
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【单选题】金属材料断后伸长率和断面收缩率越高,其塑性越 ( )
A.
好
B.
中
C.
差
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【判断题】金属材料断后伸长率和断面收缩率越高,其塑性越好。
A.
正确
B.
错误
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【单选题】She said she would live in London for ______ four or five years.
A.
another
B.
the other
C.
other
D.
every other
查看完整题目与答案
【单选题】______ is going to America for further study。
A.
He is said that
B.
People said that he
C.
It was said he
D.
It is said that he
查看完整题目与答案
【多选题】下列关于花岗石的特性的说法正确的是（ ）
A.
岩浆岩、吸水率低
B.
硬度中等，酸性石材
C.
耐磨性差、硬度大
D.
耐久性长、耐火性较差
E.
碱性石材、耐磨性好
查看完整题目与答案
【单选题】金属材料断后伸长率和断面收缩率越高,其塑性越[ ]。
A.
好
B.
差
C.
伸长率和断面收缩率与塑形无关
查看完整题目与答案
【单选题】断句: He said that he would do better in his English study.
A.
He said that he / would do better / in his English study.
B.
He said that / he would do better / in his English study.
C.
He said / that he would do better in / his English study.
D.
He said / that he would do better / in his English study.
查看完整题目与答案
【单选题】The Study of Dreams Dreams are said to be the window to the mind．Through the study of dreams, we can catch glimpses into what our subconscious minds(潜意识)are thinking, or what is troubling us at our de...
A.
Usually, our behavior. in our dreams reflects hidden desires for that type of behavior. in our waking lives.
B.
A particular dramatic or traumatic(创伤性的，使人不愉快的)experience during the day would no doubt be, encountered again in some form. or another during the night.
C.
If we encounter some kind of phenomena(现象)in our dreams, it is very likely that we already believed in the possibility of the phenomena before the dream.
D.
In this respect, the study of bad dreams and nightmares can yield(产生，带来)interesting observations in regard to the mind and status of the dreamer.
E.
Dreamers, in this sense, should pay attention to their dreams to discern what those dreams reveal about themselves.
F.
For example, a horse in the dreams of an eager equestrian(马术家) can signify comfort and relaxation, whereas the same horse in the dreams of a hunter can represent excitement and challenge. 第 46 题 请选择（1）处的最佳答案．
查看完整题目与答案
【多选题】关于园林铺地人造石材,下列说法正确的是
A.
人造石材是一种人工合成的装饰材料。
B.
聚酯型人造石是模仿大理石、花岗岩的表面纹理加工而成，具有类似的机理特点，物理力学性能差于天然石材。
C.
常见的人造石有聚酯型人造石、水磨石、水洗石等。
D.
聚酯型人造石在色泽和纹理上比天然石材美丽自然柔和，价格较天然石材便宜。
查看完整题目与答案
相关题目：
【简答题】泉州是一座文化古城,具有1700多年的历史。
查看完整题目与答案
【单选题】金属材料断后伸长率和断面收缩率越高,其塑性越 ( )
A.
好
B.
中
C.
差
查看完整题目与答案
【判断题】金属材料断后伸长率和断面收缩率越高,其塑性越好。
A.
正确
B.
错误
查看完整题目与答案
【单选题】She said she would live in London for ______ four or five years.
A.
another
B.
the other
C.
other
D.
every other
查看完整题目与答案
【单选题】______ is going to America for further study。
A.
He is said that
B.
People said that he
C.
It was said he
D.
It is said that he
查看完整题目与答案
【多选题】下列关于花岗石的特性的说法正确的是（ ）
A.
岩浆岩、吸水率低
B.
硬度中等，酸性石材
C.
耐磨性差、硬度大
D.
耐久性长、耐火性较差
E.
碱性石材、耐磨性好
查看完整题目与答案
【单选题】金属材料断后伸长率和断面收缩率越高,其塑性越[ ]。
A.
好
B.
差
C.
伸长率和断面收缩率与塑形无关
查看完整题目与答案
【单选题】断句: He said that he would do better in his English study.
A.
He said that he / would do better / in his English study.
B.
He said that / he would do better / in his English study.
C.
He said / that he would do better in / his English study.
D.
He said / that he would do better / in his English study.
查看完整题目与答案
【单选题】The Study of Dreams Dreams are said to be the window to the mind．Through the study of dreams, we can catch glimpses into what our subconscious minds(潜意识)are thinking, or what is troubling us at our de...
A.
Usually, our behavior. in our dreams reflects hidden desires for that type of behavior. in our waking lives.
B.
A particular dramatic or traumatic(创伤性的，使人不愉快的)experience during the day would no doubt be, encountered again in some form. or another during the night.
C.
If we encounter some kind of phenomena(现象)in our dreams, it is very likely that we already believed in the possibility of the phenomena before the dream.
D.
In this respect, the study of bad dreams and nightmares can yield(产生，带来)interesting observations in regard to the mind and status of the dreamer.
E.
Dreamers, in this sense, should pay attention to their dreams to discern what those dreams reveal about themselves.
F.
For example, a horse in the dreams of an eager equestrian(马术家) can signify comfort and relaxation, whereas the same horse in the dreams of a hunter can represent excitement and challenge. 第 46 题 请选择（1）处的最佳答案．
查看完整题目与答案
【多选题】关于园林铺地人造石材,下列说法正确的是
A.
人造石材是一种人工合成的装饰材料。
B.
聚酯型人造石是模仿大理石、花岗岩的表面纹理加工而成，具有类似的机理特点，物理力学性能差于天然石材。
C.
常见的人造石有聚酯型人造石、水磨石、水洗石等。
D.
聚酯型人造石在色泽和纹理上比天然石材美丽自然柔和，价格较天然石材便宜。
查看完整题目与答案
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