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
2018-05-09
42
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
观点态度题。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://www.kaotiyun.com/show/wb47777K
0
大学英语四级
相关试题推荐
ArtificialIntelligence(AI)A)Weoftendon’tnoticeit,butartificialintelligence(AT)isallaroundus.Itispresentinco
InonlytwodecadesAsianAmericanshavebecomethefastest-growingU.S.minority.Astheirchildrenbeganmovingupthroughthe
WhichAttributesofaFoodProductAreMostImportanttoConsumers?A)TheAustralianstateofVictoriaisinvestinginapro
WhichAttributesofaFoodProductAreMostImportanttoConsumers?A)TheAustralianstateofVictoriaisinvestinginapro
SomeyearsagoIwasofferedawritingassignmentthatwouldrequirethreemonthsoftravelthroughEurope.Ihadbeenabroada
SomeyearsagoIwasofferedawritingassignmentthatwouldrequirethreemonthsoftravelthroughEurope.Ihadbeenabroada
SomeyearsagoIwasofferedawritingassignmentthatwouldrequirethreemonthsoftravelthroughEurope.Ihadbeenabroada
SomeyearsagoIwasofferedawritingassignmentthatwouldrequirethreemonthsoftravelthroughEurope.Ihadbeenabroada
A、Theytendtostaywithinshoutingorrunningdistanceoftheirparents.B、Theyshouldbeawareofthepotentialrisksinthep
A、Shewasfoundstealinginabookstore.B、Shecaughtsomeoneintheactofstealing.C、Sheadmittedhavingstolensomething.D、
随机试题
控制哮喘急性发作症状的首选药物是
桩冠冠桩的直径应是根径的
注射用油的质量要求中
一般来说,商业银行应采取()模式,才能更加适应金融创新的组织结构和分工协作要求。
1.7月9日,民政部网站公布了2012年上半年全国自然灾害损失情况,各类自然灾害共造成全国11336.1万人次受灾,465人死亡,97人失踪,直接经济损失773.8亿元。近日,民政部、国家减灾委办公室会同工业和信息化部、国土资源部、交通运输部、铁
根据刑法规定,适用可以从轻或者减轻处罚的法定情节有()。
甲是乙公司员工,从乙公司离职后,将在职期间掌握的客户名单等保密信息出售给乙公司的对手丙公司。甲的行为侵害了乙公司的()
设A为m×n实矩阵,E为n阶单位矩阵.已知矩阵B=λE+ATA,试证:当λ>0时,矩阵B为正定矩阵.
某二叉树的前序遍历序列与中序遍历序列相同,均为ABCDEF,则按层次输出(同一层从左到右)的序列为()。
1983年,我国第一台亿次巨型电子计算机诞生了,它的名称是
最新回复
(
0
)