1.非选择题- (共1题)


(1)图中代表DNA相对数量变化的曲线是 .
(2)图中0—8时期表示细胞的 分裂过程.
(3)姐妹染色单体分开分别在横坐标数字的 处进行.
(4)细胞内不含同源染色体的区间是 .
(5)细胞B的名称是 ,与之相对应的曲线段是 .
(6)细胞C最终形成 个成熟生殖细胞.
(7)能表示形成C的原始生殖细胞增多过程的曲线段是 .
2.单选题- (共13题)
①DNA位于染色体上 ②染色体就是DNA ③DNA是染色体的主要成分
④染色体和DNA都是遗传物质 ⑤每条染色体上含有一个或两个DNA分子
A.①③⑤ | B.①②③ | C.②③④ | D.③④⑤ |
A.豌豆的遗传物质主要是DNA |
B.酵母菌的遗传物质主要分布在染色体上 |
C.T2噬菌体的遗传物质含有硫元素 |
D.HIV的遗传物质水解产生4种脱氧核苷酸 |
A.甲、乙两个小桶内放入两种彩球各10个 |
B.装彩球的两个小桶如果是透明的,不会对实验结果产生干扰 |
C.在每次抓取不球时,都应将桶内的小球充分混合 |
D.每次抓取小球统计后,应将彩球放回原来的小桶内,重复抓取50-100次 |
A.正确地运用统计方法,孟德尔发现在不同性状的杂交实验中,F2的分离比具有相同的规律 |
B.解释实验现象时,提出的“假说”之一:F1产生配子时,成对的遗传因子分离 |
C.根据假说,进行“演绎”:若F1产生配子时.成对的遗传因子分离,则测交实验后代应出现两种表现型,且比例为1:1 |
D.假说能解释F2自交产生3:1分离比的原因,所以假说成立 |
A.兔的白毛与黑毛,狗的长毛与卷毛都是相对性状 |
B.隐性性状是指生物体不能表现出来的性状 |
C.纯合子自交后代不会发生性状分离,杂合子自交后代不会出现纯合子 |
D.具有相对性状的纯合亲本杂交,F1表现出的性状是显性性状 |
据下表回答:
亲本组合 | 后代的表现型及其株数 | ||||
组别 | 表现型 | 高茎 红花 | 高茎 白花 | 矮茎 红花 | 矮茎 白花 |
甲 乙 丙 丁 戊 | 高茎红花×矮茎红花 高茎红花×高茎白花 高茎红花×矮茎红花 高茎红花×矮茎白花 高茎白花×矮茎红花 | 627 724 953 1251 517 | 203 750 317 0 523 | 617 243 0 1301 499 | 212 262 0 0 507 |
(1)上述两种相对性状中,显性性状为 .
(2)写出每一杂交组合中两个亲本植株的基因型.以A和a分别表示株高的显、隐性基因,B和b分别表示花色的显、隐性基因.
甲组合为
乙组合为
丙组合为
丁组合为
戊组合为
A.同一条染色体上的两个或多个基因 | B.一对同源染色体相同位置上的等位基因 |
C.姐妹染色单体相同位置上的两个基因 | D.两对同源染色体上的两对等位基因 |
3.选择题- (共14题)
(A)
“Well, we're in our new house. Let's get a new pet to get along with it,” Mrs. Brown said to her husband.
“That sounds like a pretty good idea. Do you want to see the ads in the newspaper?”said Mr. Brown.
“Let's go to the animal shelter. Many pets there need homes. Since tomorrow is Saturday, we can both go,” she said.
The next morning, the Browns met Mr. Snow at the animal shelter. “We want to be sure that the pets here can go to good homes,” Mr. Snow said, “So I need to ask you some questions.”
After they talked for a while, the Browns decided to get a small dog. It wouldn't need a big house or a big yard. A small dog would bark and warn them if someone tried to break into their house. After Mr. Snow gave the Browns a book on pet care, they chose one and wanted to take her home right away. But the animal doctor hadn't checked her yet. So Mr. Snow told them to return on Sunday.
On Sunday afternoon the Browns went to the animal shelter. The animal doctor said, “Shadow has had all of her shots(预防针). She will be healthy.” Then, the Browns thanked the doctor and took Shadow home.
(C)
Gift-giving is different from culture to culture and person to person.
When people give gifts, sometimes color is important. For example, for many Chinese people around the world, red is a lucky color, and people often like to wrap gifts in red. However, do you know that in South Korea, red is a color of death? That is why you should not wrap your gifts in this color if you are giving a gift to a person there.
What about Western countries? In Western countries, the color of wrapping paper is not really important. But color does matter when giving flowers, especially roses. You should not give red roses to a Western person you don't know very well because they are a symbol of love. You could give yellow roses instead, as these are a symbol of friendship. You could also send pink roses as gifts to say thank you.
What other things should you remember when giving gifts to someone from a different culture? Well, one thing you should keep in mind is the person's religion (宗教). When choosing a gift for a Muslim (穆斯林的) or Jewish (犹太教的) friend, you should never get food including pork, or things made from pigskin. Another thing that you should not get for a Muslim person is alcohol (酒).
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【1】题量占比
非选择题:(1道)
单选题:(13道)
选择题:(14道)
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【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:14
7星难题:0
8星难题:0
9星难题:0