题目内容

Complete the sentences with the correct words from the word bank.representsceremonycollect participatevillage1. I am from a small __________________. Its population was only 500.2. To get a good grade in this class, you have to __________________ actively. You can't be silent.3. The color green often __________________ nature, like green trees and grass.4. Maria and her husband __________________ stamps. They have stamps from every country in the world.5. A wedding is usually a beautiful __________________.

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我国哪位科学家把“gene”一次翻译为“基因”,向中国生物学家介绍遗传学的研究进展。

A. 袁隆平
B. 谈家桢
C. 屠呦呦
D. 李振声

金鱼草F1花色表现为双亲性状的中间型,这样的显性类型是( )

A. ‍完全显性
B. 不完全显性
C. 共显性
D. 镶嵌显性

人类青年时期的秃顶基因在男性中表现为显性,女性中表现为隐性,且知道该基因位于常染色体上,则这种现象属于( )。

A. 性连锁

B. 从性遗传
C. 限性遗传
D. 伴性遗传

基因型为AAbbCC与aaBBcc的小麦进行杂交,F1形成的配子种类数和F2的基因型种类数分别是()

A. 4和27
B. 2和81
C. 8和27
D. 4和9

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