1.非选择题- (共1题)
(1)写出有关操作步骤的名称：①__________；
(2)豌豆红花（R）对白花（r）为显性，把标号④杂种种子作为亲本种下，F1的基因型为_______，表现型为__________。
(3)孟德尔通过豌豆一对相对性状的杂交实验，揭示出__________________定律。
Ⅱ．(10分)牛的毛色有黑色和棕色，如果两头黑牛交配，产生了一头棕色子牛。请回答：
(1)黑色和棕色哪种毛色是显性性状？________。
(2)若用B与b表示牛的毛色的显性遗传因子与隐性遗传因子，写出上述两头黑牛
及子代棕牛的遗传因子组成依次是________________。
(3)上述两头黑牛产生一黑色子牛的可能性是________。若上述两头黑牛产生了一
头黑色子牛，该子牛为纯合子的可能性是________，要判断这头黑色子牛是纯合
子还是杂合子，最好选用与其交配的牛是 ( )
| A．纯种黑牛 | B．杂种黑牛 |
| C．棕色牛 | D．以上都不对 |
2.单选题- (共7题)
| A．F1表现显性性状，F1自交产生四种表现型不同的后代，比例是9∶3∶3∶1 |
| B．F1形成配子时，每对遗传因子彼此分离，不同对的遗传因子自由组合，F1产生四种比例相等的配子 |
| C．F1产生数目和种类相等的雌雄配子，且雌雄配子结合机会相同 |
| D．F1测交将产生四种表现型的后代，比例为1∶1∶1∶1 |
| 杂交 | 亲本 | 后代 |
| 杂交A | 灰色×灰色 | 灰色 |
| 杂交B | 黄色×黄色 | 3/4黄色、1/4灰色 |
| 杂交C | 灰色×黄色 | 1/2黄色、1/2灰色 |
| A．杂交A后代不发生性状分离，亲本为纯合子 |
| B．由杂交B可判断鼠的黄色毛基因是显性基因 |
| C．杂交B后代中黄色毛鼠中杂合子的概率为1/2 |
| D．鼠毛色这对相对性状的遗传符合基因的分离定律 |
A. 1/16 B. 2/16 C. 3/16 D. 4/16
①后代可能没有性状分离，全为显性类型；②后代可能出现3∶1的性状分离比；③后代可能出现1∶1的性状分离比；④后代可能没有性状分离，全为隐性类型
| A．①② | B．③④ | C．①④ | D．②③ |
| A．杂合子的双亲至少一方是杂合子 |
| B．杂合子与纯合子基因组成不同，性状表现也不同 |
| C．孟德尔巧妙设计的测交方法只能用于检测F1的基因型 |
| D．F2的3∶1性状分离比一定依赖于雌雄配子的随机结合 |
| A．寄生、共生、竞争、捕食 | B．竞争、寄生、捕食、共生 |
| C．竞争、捕食、寄生、共生 | D．共生、寄生、竞争、捕食 |
3.选择题- (共7题)
阅读下面短文，掌握其大意，然后从每题所给的A、B、C、D四个选项中选出一个最佳选项。
My name is Jenny. I am twelve years old. I have some 1 . They are Mike, Jack, Mary and Kate. We are middle school 2 . Mike and Jack 3 in the same class. 4are in Class Two, Grade One. Mary, Kate and I are 5 Class Three. This is Mr. Green. 6is our English teacher. This is 7new classroom. In the classroom, you can see 45 desks and chairs. They are green. A blackboard, a clock and a map are 8 the wall. On a desk you can see 9 pencils. The red one is mine. The green one is Kate's. The yellow one is Mary's. Mike's pencil isn't there. His pencil is in his bag.
Look! You can see a ball under a desk. That's Kate's desk. The ball is 10 , too. This is my desk. You can see some books on it. They are our new books.
阅读下面短文，掌握其大意，然后从每题所给的A、B、C、D四个选项中选出一个最佳选项。
My name is Jenny. I am twelve years old. I have some 1 . They are Mike, Jack, Mary and Kate. We are middle school 2 . Mike and Jack 3 in the same class. 4are in Class Two, Grade One. Mary, Kate and I are 5 Class Three. This is Mr. Green. 6is our English teacher. This is 7new classroom. In the classroom, you can see 45 desks and chairs. They are green. A blackboard, a clock and a map are 8 the wall. On a desk you can see 9 pencils. The red one is mine. The green one is Kate's. The yellow one is Mary's. Mike's pencil isn't there. His pencil is in his bag.
Look! You can see a ball under a desk. That's Kate's desk. The ball is 10 , too. This is my desk. You can see some books on it. They are our new books.
阅读下面短文，掌握其大意，然后从每题所给的A、B、C、D四个选项中选出一个最佳选项。
My name is Jenny. I am twelve years old. I have some 1 . They are Mike, Jack, Mary and Kate. We are middle school 2 . Mike and Jack 3 in the same class. 4are in Class Two, Grade One. Mary, Kate and I are 5 Class Three. This is Mr. Green. 6is our English teacher. This is 7new classroom. In the classroom, you can see 45 desks and chairs. They are green. A blackboard, a clock and a map are 8 the wall. On a desk you can see 9 pencils. The red one is mine. The green one is Kate's. The yellow one is Mary's. Mike's pencil isn't there. His pencil is in his bag.
Look! You can see a ball under a desk. That's Kate's desk. The ball is 10 , too. This is my desk. You can see some books on it. They are our new books.
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【1】题量占比
非选择题:(1道)
单选题:(7道)
选择题:(7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：6
7星难题：0
8星难题：0
9星难题：2