首页
登录
职称英语
Henry III didn’t know much about biology. He went through six wives back in
Henry III didn’t know much about biology. He went through six wives back in
游客
2024-02-03
15
管理
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." [br] 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://tihaiku.com/zcyy/3417466.html
相关试题推荐
Anewstudyshowsthatstudentslearnmuchbetterthroughanactive,iterati
Anewstudyshowsthatstudentslearnmuchbetterthroughanactive,iterati
Nextmonth,NewYorkstudentsingradesthreethrougheightwilltakethest
Nextmonth,NewYorkstudentsingradesthreethrougheightwilltakethest
Nextmonth,NewYorkstudentsingradesthreethrougheightwilltakethest
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
随机试题
(1)OnhisbenchinMadisonSquare,Soapymoveduneasily.Whenwildgeesehon
WalkingdownanyofShanghai’smainshoppingstreetsthisweek,newcomersmi
[originaltext]Nowlistentothefollowingrecordingandanswerquestions16to
咽喉部CT扫描技术不包括A.咽喉部常规检查,一般以横断位、螺旋扫描为主 B.定
以下哪项消化性溃疡并发症无需外科手术治疗:A.大量出血经内科治疗无效 B.
站用交流电源系统特殊巡视,雨、雪天气,检查()。户外电源箱无漏雨。$;$配
勘察合同履行过程中,勘察人承担违约责任的形式有()。A.支付违约金 B.支付
回收到磁性产品中的磁性矿粒的运动轨迹,是由作用于磁性矿粒上的磁力和机械力的合力来
A.巨细胞 B.R-S细胞 C.无上皮衬里 D.釉质 E.黏液细胞黏液表
(2017年真题)在城镇供热管网闭式系统中,一次热网与二次热网采用()连接。
最新回复
(
0
)