问题 填空题 案例分析题

有人发现了一种受细胞质基因控制的抗除草剂突变体水稻。请你以该突变体水稻和正常水稻植株为材料,用杂交实验的方法,验证抗除草剂性状属于细胞质遗传。

①方法步骤:第一步:a.让抗除草剂突变体水稻作为母本与正常水稻杂交,获取F1;b.(),获取F1。

答案

参考答案:让抗除草剂突变体水稻作为父本与正常水稻杂交

解析:如果细胞细胞核遗传,则遵循基因的分离定律,因此正交和反交的后代表现型结果相同;而细胞质遗传具有母系遗传的特点,即后代的表现型与母本相同,因此用抗除草剂突变体水稻作为母本或母本后代的表现型将不同。

单项选择题
阅读理解

In just two months, the latest buzzword from the Internet, diaosi, has spread so much that it can be found everywhere—from online forums(论坛) to micro blogs. Many people even call themselves diaosi. It’s not the first time a term has gone popular on the Internet in China. However, why is the word so viral that is has become a cultural phenomenon? Here, we tell you something you want to know about it.

Where it began

The word originated in Baidu. Com’s Tieba (a top Chinese bulletin board system) of soccer player Li Yi. There, fans of Li, who are called yisi in Chinese, not only talk about soccer but complain about their lives, work and relationships. Yisi, who are known for their rude and dirty language, were given the name diaosi by others who have seen their posts.

What a “diaosi” is like

The word diaosi was coined first by single, young men who feel they have dead-end lives. Generally, men in this category don’t earn enough, are not good-looking, and have difficulty winning promotion(晋升). Unlike their upper-class contemporaries(同代人), they lack influential families, useful social networks for their careers, and most importantly, suitable women to marry. “I’m just a diaosi, poor and plain-looking. Who will marry me?” The sigh can be heard, which is half self-mockery(自嘲), half reality. Many young men call themselves diaosi because they feel they are among the lowest classes of the society.

“Diaosi” culture reflects social changes

According to Zhu Chongke, a professor in the School of Asia-Pacific Studies at Sun Yat-sen University in Guangzhou, the popularity of this word diaosi stems from the fact that is was created by common people and thus resonates(共鸣) with a huge population. “Labeling yourself a diaosi offers a way for people to mock themselves and relieve pressure, hence it spread quickly,” he told Xinhua Agency. “The attitude is basically: ‘I already have little to lose, so why don’t I mock myself for gun?’.” The phenomenon reflects a larger social issues. These young people have no influential family background, no chances of receiving promotion at work or no economic strength to find a proper woman to marry. It reflects a deep sense of loss.

小题1:Diaosi refers to the ones with following features except      .

A.the ones who don’t earn much.

B.the ones who are not good-looking.

C.the ones who have difficulty winning promotion

D.the ones who have suitable people to marry.小题2:The word “diaosi” is so popular because         .

A.It was used to describe the fans of soccer player Li Yi.

B.It was created by common people and resonates with a huge population.

C.It is new and interesting.

D.It helps people who are among the lowest classes mock themselves.小题3:Which of the following is NOT true?

A.It’s not the first time a term like “diaosi” has gone popular on the Internet.

B.The name “diaosi” was given by those people who are among the lowest classes.

C.Many young people call themselves diaosi because they have a deep sense of loss.

D.Calling yourself diaosi can probably mock yourselves and release pressure.小题4:The author’s attitude to diaosi is      .

A.positive

B.negative

C.neutral(中立的)

D.indifferent