首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
As any human being knows, many factors govern whether people are happy or unhappy. External circumstances are important: employe
As any human being knows, many factors govern whether people are happy or unhappy. External circumstances are important: employe
admin
2016-12-13
22
问题
As any human being knows, many factors govern whether people are happy or unhappy. External circumstances are important: employed people are happier than unemployed ones and better-off people than poor ones.
Age has a role, too
. But personality is the single biggest determinant: extroverts are happier than introverts, and confident people happier than anxious ones.
That personality, along with intelligence, is at least partly heritable is becoming increasingly clear; so, presumably, the tendency to be happy or miserable is, to some extent, passed on through DNA. To try to establish just what that extent is, a group of scientists examined over 1, 000 pairs of twins from a huge study on the health of American adolescents. They conclude that about a third of the variation in people’ s happiness is heritable.
But while twin studies are useful for establishing the extent to which a characteristic is heritable, they do not finger the particular genes at work. One of the researchers, Jan-Emmanuel De Neve, of University College, London, and the London School of Economics, has tried to do just that, by picking a popular suspect—the gene that encodes the serotonin-transporter protein, and examining how variants of that gene affect levels of happiness.
Serotonin is involved in mood regulation. Serotonin transporters are crucial to this job. The serotonin-transporter gene comes in two functional variants—long and short People have two versions(known as alleles). The adolescents in Dr. De Neve’ s study were asked to grade themselves from very satisfied to very dissatisfied. Dr. De Neve found that those with one long allele were 8% more likely than those with none to describe themselves as very satisfied; those with two long alleles were 17% more likely.
Which is interesting. Where the story could become controversial is when the ethnic origins of the volunteers are taken into account. All were Americans, but they were asked to classify themselves by race as well. On average, the Asian Americans in the sample had 0.69 long genes, the black Americans had 1.47 and the white Americans had 1.12.
There is growing interest in the study of happiness, not just among geneticists but also among economists and policymakers dissatisfied with current ways of measuring humanity’s achievements. Future work in this field will be read avidly in those circles.
It can be inferred from the passage that_____.
选项
A、some have two short alleles, and others have two long ones
B、different races may have different propensities for happiness
C、the notion that human personality is a blank slate is strengthened
D、those with two short alleles were more likely than those with one long allele
答案
B
解析
根据题干关键词定位到整篇文章。第四段前三句提到“血清素与情绪调节有关……血清素转运体基因有两种变体:长型和短型”,根据第五段中“不同的种族有不同数量的长型基因”可推断出B项“不同种族的幸福倾向不尽相同”。A项缺少了一种搭配,即“有些人长型短型等位基因各一个”;第二段首句提到“性格……是遗传的,这个观点正变得越来越明确”,所以C项观点的说服力应该是逐渐减弱;D项过度推断,均排除。
转载请注明原文地址:https://jikaoti.com/ti/iiT7FFFM
0
考研英语一
相关试题推荐
Lawyersarelessthan1%ofAmericanadults,【C1】______theyarewell-representedingovernment.Boththepresidentandthevice-p
Lawyersarelessthan1%ofAmericanadults,【C1】______theyarewell-representedingovernment.Boththepresidentandthevice-p
Lawyersarelessthan1%ofAmericanadults,【C1】______theyarewell-representedingovernment.Boththepresidentandthevice-p
Lawyersarelessthan1%ofAmericanadults,【C1】______theyarewell-representedingovernment.Boththepresidentandthevice-p
Lawyersarelessthan1%ofAmericanadults,【C1】______theyarewell-representedingovernment.Boththepresidentandthevice-p
Lawyersarelessthan1%ofAmericanadults,【C1】______theyarewell-representedingovernment.Boththepresidentandthevice-p
Lawyersarelessthan1%ofAmericanadults,【C1】______theyarewell-representedingovernment.Boththepresidentandthevice-p
Lawyersarelessthan1%ofAmericanadults,【C1】______theyarewell-representedingovernment.Boththepresidentandthevice-p
随机试题
(2012年)根据成本推进型通货膨胀理论,导致利润推进型通货膨胀的因素是()。
下列函数在区间(一∞,+∞)上单调减少的是
下颌舌骨嵴前方,口底上升时的最高点下颌颊系带后部与嚼肌下段前缘之间,可承受较大力
A.牙源性颌骨囊肿B.发育性囊肿C.阻塞性囊肿D.牙源性肿瘤E.孤立性囊肿第二鳃裂囊肿属于
患者,男,56岁。近1个月来始有左侧舌根、软腭及咽部阵发性剧烈疼痛,并向外耳道放射。吞咽、说话均可引起疼痛,甚至夜间有疼醒现象,临床检查以上部位未见明显肿胀.黏膜色正常无溃疡,服用卡马西平有效。最有可能的原因是
风险管理的最基本要求是()。
下列关于量本利分析基本假设的表述中,不正确的是()。
协调外交
Sincethetwosculpturesare______,onemustbeareplicaoftheother.
Everyotherweekitseemsanewstudycomesoutthataddstoouralready-formidablestoreofparentalworries.Butevenbythose
最新回复
(
0
)