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
外语
Henry III didn’t know much about biology. He went through six wives back in the 1500s, looking for one who could bear him a son.
Henry III didn’t know much about biology. He went through six wives back in the 1500s, looking for one who could bear him a son.
admin
2010-10-14
76
问题
Henry III didn’t know much about biology. He went through six wives back in the 1500s, looking for one who could bear him a son. Scientists now know that it’s the father’s sperm, not the mother’s egg, which determines whether a baby is a boy or a girl. And last week researchers at the Genetics and IVF Institute, a private fertility(生育能力)center in Virginia, announced a new technique that will allow parents to choose the sex of their baby-to-be, before it has even been conceived. The scientist used a tiny laser detector to measure the DNA in millions of sperm cells as they pass single file through a narrow tube, like cattle being herded through a corral(牲口栏). In a study published last week, "girl sperm," which has more DNA—the genetic material— in each cell, was collected, while "boy sperm" was discarded. And when purified girl sperm was used to impregnate(使受孕)a group of mothers, 15 of 17 resulting babies turned out to be girls.
The researchers say that "sex selection" can also double a mother’s chance of having a son and can be used to avoid genetic diseases that affect only one gender, such as hemophilia(血友病). But some experts, like New York University fertility specialist Dr. Jamie Grifo, worry that sex selection could lead to a kind of in uteri(子宫)discrimination, especially in cultures where sons are considered superior to daughters. "It’s valuing one gender’ over another," Grifo says. "I don’t think that’s something we should be doing." So far, patients at the institute have been asking for both boys and girls, in order to "balance" their families. And some ethics experts say that’s fine, as long as parents are just looking for a little gender variety. "If you have three boys, and you want a girl," says University of Texas reproductive-law professor John Robertson, "that’s not gender bias at all."
It can be concluded from the passage that the author’s attitude toward "sex selection" is ______.
选项
A、negative
B、positive
C、neutral
D、favorable
答案
C
解析
文章第2段中作者给出了一些反对者和赞成者的观点,但是没有加以评论,可以看出作者的态度是中立的,故选项C正确。
转载请注明原文地址:https://kaotiyun.com/show/pp87777K
0
大学英语四级
相关试题推荐
Eachforitsownreason,thestudyofresidentialmobilityhasbeenaconcernofthreedisciplines:sociology,economics,andge
OnenightinApril1912,ahugenewoceanliner,theTitanic,wascrossingtheAtlantic.Shewasjustaboutthemost【B1】______shipt
A、Privatedonations.B、Governmentfunding.C、Grantsfromcorporations.D、Feespaidbystudents.B
AftertheviolentearthquakethatshookLosAngelesin1994,earthquakescientistshadgoodnewstoreport:Thedamageanddeath
Forthispart,youareallowed30minutestowriteashortessayentitledCriticism.Youshouldwriteatleast120wordsfollowi
A、Thefederalgovernment.B、Individualschools.C、Therespectivestates.D、Localcommunities.D题目问谁负责学校的管理。从短文听到“Thestateautho
A、PhonetheVillageInnforareservation.B、Askherparentstocomesomeothertime.C、Calleachhotelintheareatocheck.D、
A、Therewasatrafficaccident.B、Acarwassmashedbyafallingobject.C、Acarhitsomeonenearthehighbuilding.D、Adriver
Forthispart,youareallowed30minutestowritealetterofadvicetoyourcousinabouthowtospendthefirstwinterholiday
A、Thattheypayattentiontothetime.B、Thattheyarecarefuloftheirexamination.C、Thattheypreparefortheexamearly.D、T
随机试题
纳板河流域自然保护区是按小流域生物圈保护理念规划建设的多功能、综合型自然保护区。下图中甲为纳板河流域自然保护区水系图,乙为纳板河流域多年平均气温和降水量统计图。读图完成下列问题。下列地理人物与其著作匹配不正确的是()。
中药鉴定的法定依据是
不得委托生产的药品有
城市道路衔接的原则不包括()。
关于资本资产定价模型(CAPM)和套利定价模型(APT)对风险来源的定义,下列说法正确的有( )。Ⅰ.资本资产定价模型(CAPM)的定义是具体的Ⅱ.资本资产定价模型(CAPM)的定义是抽象的Ⅲ.套利定价模型(APT)的定义是具体的Ⅳ.套利定价模型
35岁的张先生是双薪家庭,夫妻两人月薪合计10000元。资产有存款50000元,股票投资成本100000元,9月初为筹首付款以110000元出售,赚了10000元;买入自用房地产市价500000元,负债有房贷350000元。今后每月支出除生活费5000元外
()是导游员成就事业之本,是导游员必备的素质修养。
【2015.河北沧州】学生在学习弹奏钢琴曲的过程中,当练习到一定阶段时,常会感到自己的进步似乎停止了.这种现象属技能学习中的()。
A、 B、 C、 C
A、BuysomethingintheBillsupermarket.B、Getmoneytopayhisbill.C、Checktoseewhetherhecanpayincash.D、Getacheckf
最新回复
(
0
)