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
4
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://www.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
Theshortstoriesoftenwithsurpriseendingssuchas"TheGiftofMagi"and"Th
______(为了寻找改善质量的途径),theyaregoingtohaveadiscussion.Inordertofindwayst
在吊顶工程中,吊扇、吊灯等重物应安装在( )上。A.龙骨 B.主龙骨 C.
若加强腹股沟前壁宜选择何种修补术()A.Bassini法 B.Fergu
根据《关于加强金融消费者权益保护工作的指导意见》,银行业金融机构应充分提示风险,
采用蒸馏法制备注射用水是利用热原的A被吸附性 B水溶性 C耐热性 D滤过性
中央银行增加基础货币的途径有()。A:增加现金发行 B:增加现金回笼 C:调
Wearefacingbothpromisingopportuniti
小王从市委宣传部调入到市公安局某部门工作,经该市公安局警察训练支队培训合格后在人
房地产估价的市场法中,可比实例在自身状况下的价格乘以()等于可比实例在估价对象状
最新回复
(
0
)