题干

经人类染色体组型分析发现,有2%~4%的精神病患者的性染色体组成为XYY。诸多案例显示XYY综合症患者有反社会行为和 暴力倾向,有人称多出的Y染色体为“犯罪染色体”。下列关于XYY综合症的叙述正确的是(  )

A:患者为男性,可能是由母方减数第一次分裂异常所致

B:患者为女性,可能是由母方减数第二次分裂异常所致

C:患者为男性,可能是由父方减数第二次分裂异常所致

D:患者为女性,可能是由父方减数第二次分裂异常所致

上一题 下一题 0.0难度 选择题 更新时间:2019-12-30 06:15:53

答案(点此获取答案解析)

C

同类题3

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

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The meaning of phubbing

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

____

The reason why the writer asks us to stop posting photos

____