1.选择题- (共11题)
1.长翅红眼雄蝇与长翅白眼雌蝇交配,产下一只染色体组成为XXY的残翅白眼雄蝇。已知翅长、眼色基因分别位于常染色体(A一长翅,a一残翅)和X染色体(B一红眼,b一白眼)上。在没有基因突变的情况下,下列分析正确的是
2.长翅红眼雄蝇与长翅白眼雌蝇交配,产下一只染色体组成为XXY的残翅白眼雄蝇。已知翅长、眼色基因分别位于常染色体(A一长翅,a一残翅)和X染色体(B一红眼,b一白眼)上。在没有基因突变的情况下,下列分析正确的是
6.某小岛上原有果蝇20000只,其中基因型VV、Vv和vv的果蝇分别占15%、55%和30%。若此时从岛外入侵了2000只基因型为VV的果蝇,且所有果蝇均随机交配,则F1代中V的基因频率约是
7.为研究胰腺分泌活动的调节机制,研究人员对实验动物做了下列实验。
根据以上实验,下列推断最合理的是
实验 | 处理方法 | 胰液分泌量 |
① | 用适宜的电流刺激通向胰腺的神经 | 增加 |
② | 切断通向胰腺的所有神经,当食物经胃进入十二指肠中 | 增加 |
③ | 切断通向胰腺的所有神经,从另一些动物的胃中取出少量部分被消化了的食物,导入十二指肠中 | 大量增加 |
④ | 切断通向胰腺的所有神经,把一些相同成分的食物不经过胃而直接引入十二指肠中 | 不增加 |
9.下面关于减数分裂的叙述中,正确的一组是
①生物在生殖过程中都要进行减数分裂 ②同源染色体的彼此分离发生在减数第二次分裂 ③次级精母细胞中不存在同源染色体 ④减数分裂过程中染色体数目和DNA分子含量变化完全相同 ⑤正常的减数分裂过程中,不同的同源染色体之间是自由结合的
⑥减数分裂过程中,四分体数目和同源染色体对数相同
①生物在生殖过程中都要进行减数分裂 ②同源染色体的彼此分离发生在减数第二次分裂 ③次级精母细胞中不存在同源染色体 ④减数分裂过程中染色体数目和DNA分子含量变化完全相同 ⑤正常的减数分裂过程中,不同的同源染色体之间是自由结合的
⑥减数分裂过程中,四分体数目和同源染色体对数相同
10.下面关于减数分裂的叙述中,正确的一组是
①生物在生殖过程中都要进行减数分裂 ②同源染色体的彼此分离发生在减数第二次分裂 ③次级精母细胞中不存在同源染色体 ④减数分裂过程中染色体数目和DNA分子含量变化完全相同 ⑤正常的减数分裂过程中,不同的同源染色体之间是自由结合的
⑥减数分裂过程中,四分体数目和同源染色体对数相同
①生物在生殖过程中都要进行减数分裂 ②同源染色体的彼此分离发生在减数第二次分裂 ③次级精母细胞中不存在同源染色体 ④减数分裂过程中染色体数目和DNA分子含量变化完全相同 ⑤正常的减数分裂过程中,不同的同源染色体之间是自由结合的
⑥减数分裂过程中,四分体数目和同源染色体对数相同
2.单项选择- (共12题)
12.
Linda didn’t get there on time because of the bad weather. What’s more, her car
was in poor .
was in poor .
A.position | B.condition | C.situation | D.direction |
13.
helicopter can take off and land straight up or down, and can also stay
still in air.
still in air.
A.The; an | B.A; the | C.A; 不填 | D.The; 不填 |
14.
– I couldn’t help her the news she failed in the examination.
A.to tell; that | B.telling; what | C.to tell; what | D.telling; that |
15.
after having been painting the house all day, James called, saying he
wouldn’t come to our party.
wouldn’t come to our party.
A.Having tired out | B.Being tired out | C.To be tired out | D.Tired out |
16.
The boy tried his best to make himself in his English.
A.understood; breaking | B.understand; breaking |
C.understand; broken | D.understood; broken |
17.
--- Is the food served in the restaurant tasty?
---I’m sure that else in this town can you find a better restaurant.
---I’m sure that else in this town can you find a better restaurant.
A.anywhere | B.nowhere | C.everywhere | D.somewhere |
18.
Many of us who have never been to Egypt always associate Egypt the ancient
pyramids.
pyramids.
A.to | B.about | C.with | D.on |
19.
All his attempts to unlock the door were , because he was using the wrong key.
A.in return | B.in vain | C.in doubt | D.in time |
20.
I paid a visit to the small town last week where I was born, which I hadn’t visited for years.
A.Every time | B.Once more |
C.On time | D.Now and then |
21.
is known to us all is the old scientist, for whom life was hard in the
past, still works very hard in his eighties.
past, still works very hard in his eighties.
A.What; what | B.What; that | C.That; what | D.As; that |
22.
a second time, will the man have one more try?
A.Turn down | B.If turning down |
C.To turn down | D.If turned down |
试卷分析
-
【1】题量占比
选择题:(11道)
单项选择:(12道)
-
【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:0
7星难题:0
8星难题:12
9星难题:0