问题 单项选择题

基因的分离定律和自由组合定律发生在()

A.前者减数第一次分裂,后者受精作用

B.前者减数第一次分裂,后者减数第二次分裂

C.都是减数第一次分裂

D.前者减数第二次分裂,后者受精作用

答案

参考答案:C

解析:基因分离定律的实质:等位基因随着同源染色体的分开而分离。而同源染色体的分离发生在减数第一次分裂后期;基因自由组合定律的实质:非同源染色体上的非等位基因自由组合,而非同源染色体的自由组合发生在减数第一次分裂后期。故选C考点:本题考查基因的分离定律和自由组合定律发生的时间。点评:本题意在考查考生的识记能力,属于容易题。

阅读理解

Reseachers at the University of Kansas say that people can accurately judge 90 percent of a stranger's personality simply by looking at the person’s shoes.“Shoes convey useful information about their wearers,’’the authors wrote in the new study published in the Journal of Research in Personality.

Lead researcher Omri Gillath said the judgments were based on the style,cost,color and condition of someone’s shoes.In the study,63 University of Kansas researchers looked at pictures showing 208 different pairs of shoes worn by the study’s participants.Volunteers in the study were photographed in their most commonly worn shoes,and then filled out a personality questionnaire.

Some of the results were expected:People with higher incomes most commonly wore expensive shoes,and flashier shoes were typically worn by outgoing people.However,some of the more specific results are strange enough.For example,“practical and functional’’shoes were generally worn by more“pleasant"people,while ankle boots were more linked with ‘‘aggressive’’personalities.The strangest of all may be that those who wore‘‘uncomfortable looking” shoes tend to have “calm” personalities. And if you have several pairs of new shoes or take extreme care of them,you may suffer from“attachment anxiety",spending lots of time worrying about what other people think of your appearance.There was even a political calculation in the mix with more liberal(主张变革的)types wearing“shabbier and less expensive” shoes.

The researchers noted that some people will choose shoe styles to mask their actual personalities,but researchers noted that volunteers were also likely to be unaware that their footwear choices were showing the deep side of their personalities.

小题1:What does this text mainly tell us?

A.People’s personalities call be judged by their shoes.

B.Shoes convey false information about the wearer.

C.People know little about their personalities.

D.Shoes Call hide people’s real personalities.小题2:The participants were asked to       

A.look at pictures of different shoes

B.provide pictures of their shoes

C.hand in their commonly worn shoes

D.design a personality questionnaire小题3:Which of the results is beyond people’s expectation?

A.Pleasant people like wearing uncomfortable shoes.

B.Wealthy people often wear expensive shoes.

C.Flahshier shoes are typically worn by outgoing people.

D.Aggressive people are likely to weal"ankle boots.小题4:People suffering from“attachment anxiety” tend to       

A.become a political leader

B.have a calm character

C.worry about their appearance

D.wear strange shoes小题5:The author wrote the text in order to      

A.teach how to choose shoes

B.describe different personalities

C.inform us of a new study

D.introduce a research method

问答题 简答题