题干

孟德尔验证“分离定律”假说的最重要的证据是(  )

A:亲本产生配子时,成对的等位基因发生分离

B:杂合子自交发生3:1的性状分离比

C:杂合子与隐性亲本杂交后代发生1:1的性状分离比

D:两对相对性状杂合子产生配子时非等位基因自由组合

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答案(点此获取答案解析)

C

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信息归纳:阅读下文,根据所提供的信息,完成下列表格。

Stop Phubbing (别当低头族)

     Last month, Justin Valdez, a college student was shot in subway in San Francisco, the U.S. The surveillance(监控) video showed that before Justin was killed, the killer pulled out the gun several times, and even wiped his nose with it. However, nobody noticed the killer. The surrounding passengers all focused on their mobile phones.

     We may see the same scene everywhere in the life: in subway, restaurants. Elevators, roads, people are watching their mobile phones. From family reunion to date with a friend, people can't stop checking their WeChat, Facebook on the mobile phone and snubbing(无视) the persons in front completely. Not only the young people, but also the olds and the kids.

     “Phubbing” is a new word which comes from the words “phone” and “snub”. It means the habit of snubbing someone in favor of(只顾着) a mobile phone. The word “phubbing” was included in the Australian National Dictionary in 2012. So we can see phubbing is spreading globlly.

     Phubbing seems innocuous(无害的); however, it disturbs our life. Stop posting photos. Let's put down the mobile phone and enjoy the real taste of food and the warmth of interpersonal(人与人之间) communication.

Information Card

The place where Justin Valdez comes from

____

The things that the passengers focused on when Justin Valdez was shot

____

The meaning of phubbing

____

The time when the word “phubbing” was included in the Australian National Dictionary

____

The reason why the writer asks us to stop posting photos

____