1.非选择题- (共3题)

(1)图中,分裂后能够产生卵细胞的是 ,图B处于减数分裂的 时期。图C中含有 对同源染色体。
(2)减数分裂过程中细胞分裂 次,其结果是细胞中的染色体数目比原来的 。
(3)对于进行有性生殖的生物来说,减数分裂和 对于维持每种生物前后代体细胞中染色体数目的恒定性,对于生物的遗传和变异都是十分重要的。
(4)请画出这种生物减数分裂过程中染色体数目变化曲线和DNA数目变化曲线。

(1)致病基因位于 染色体上,属 性遗传。
(2)8号基因型 ,7号基因型 。
(3)6号和7号婚配,所生男孩中出现此种遗传病的几率是 。
(1)雌豚鼠甲的基因型为 ,雄豚鼠乙的基因型为 ,白色子豚鼠丙的基因型为 。
(2)这对黑色豚鼠再生一个白色豚鼠的可能性是 。
(3)黑色雌豚鼠甲与黑色雄豚鼠乙通过有性生殖产生的后代中出现了白色子豚鼠,这种现象在遗传学上称为 。产生这种现象的原因是 。
(4)用遗传图解表示甲、乙黑色豚鼠生出白色子豚鼠丙的过程。(要求标出亲本,配子,子代基因型及表现型)

2.选择题- (共6题)
When I was in Grade Eight, I was not good at study. In fact, my teachers thought I was the {#blank#}1{#/blank#} (差) student. My family also had the same idea {#blank#}2{#/blank#} (与……一样) my teachers.
When I {#blank#}3{#/blank#} (打算) to give up my studying, a new teacher, Miss Wang {#blank#}4{#/blank#} (出现) in our school. She was young, kind and always dressed {#blank#}5{#/blank#} (美丽的).
One day, I sat quietly and sadly in the classroom. Miss Wang came up to me and asked me why. "Do you think I can go to Zhuji Middle School?" I didn't know why I asked such a question. I thought she must say "no". {#blank#}6{#/blank#} (然而), she said, "Dear, anything in the world may {#blank#}7{#/blank#} (发生). Just try and you'll get much {#blank#}8{#/blank#} (靠近) to your dream. I'm sure you are the best."
With tears in my eyes, I decided to be a {#blank#}9{#/blank#} (辛勤的) student. In the end, I did well in my studies and truly went to my dream school. Miss Wang's words helped me to see that I can be {#blank#}10{#/blank#} (成功) in my life, too.
B
Some people see a hobby as a waste of time. They think a hobby is only something to pass the time. In fact, a hobby is much more than that. Its advantages(优点)are as follows.
People can have time for themselves.
If one has a hobby, he or she can enjoy quiet time. People usually think more clearly when they enjoy their favorite hobbies. People often get some good ideas at that time.
People can discover their talent.
People often find new talent of themselves when they enjoy their hobbies. Some people find their talent for playing the piano only when they sit down and play. The only way to find this talent is to try. The first thing you should do is to find something that you are interested in.
People can feel relaxed.
Most hobbies are good ways to relax. Coming home from work and sitting down to enjoy things you like helps you relax. Hobbies also help you get a better sleep.
B
Some people see a hobby as a waste of time. They think a hobby is only something to pass the time. In fact, a hobby is much more than that. Its advantages(优点)are as follows.
People can have time for themselves.
If one has a hobby, he or she can enjoy quiet time. People usually think more clearly when they enjoy their favorite hobbies. People often get some good ideas at that time.
People can discover their talent.
People often find new talent of themselves when they enjoy their hobbies. Some people find their talent for playing the piano only when they sit down and play. The only way to find this talent is to try. The first thing you should do is to find something that you are interested in.
People can feel relaxed.
Most hobbies are good ways to relax. Coming home from work and sitting down to enjoy things you like helps you relax. Hobbies also help you get a better sleep.
3.单选题- (共7题)
①1866年孟德尔的的豌豆杂交实验:提出遗传因子
②1903年萨顿研究蝗虫的精子和卵细胞形成过程,提出假说:基因在染色体上
③1910年摩尔根进行果蝇杂交实验:找到基因在染色体上的实验证据
他们在研究的过程所使用的科学研究方法依次为
A.①假说一演绎法 ②假说一演绎 ③类比推理 |
B.①假说一演绎法 ②类比推理 ③类比推理 |
C.①假说一演绎法 ②类比推理 ③假说一演绎法 |
D.①类比推理 ②假说一演绎 ③类比推理 |
A.WwDd × wwdd | B.WWDd × WWdd | C.WwDd × wwDD | D.WwDd × WWDD |
-
【1】题量占比
非选择题:(3道)
选择题:(6道)
单选题:(7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:8
7星难题:0
8星难题:1
9星难题:1