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
2024-02-17
17
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/3459944.html
相关试题推荐
Japanisgoingthroughacomplexnationalidentitycrisis.Thatmaybenoba
Japanisgoingthroughacomplexnationalidentitycrisis.Thatmaybenoba
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
Throughouthistorythebasicunitofalmosteveryhumansocietyhasbeenthe
Knowledgemaybeacquiredthroughconversation,watchingtelevisionortrave
Knowledgemaybeacquiredthroughconversation,watchingtelevisionortrave
随机试题
Packaging(包装)isanimportantformofadvertising.Apackagecansomethingm
在现有的生产技术水平和正常生产经营能力的前提下,应该达到的标准成本是()。A.历
下列不属于雌激素作用部位的是A.阴道 B.肾脏 C.输卵管 D.乳腺 E
A.1年 B.2年 C.3年 D.4年 E.5年公共场所的卫生许可证几年
某拦河水闸所在工程等别为Ⅱ等,其校核洪水过闸流量为5500m3/s,则其最高可为
有关支原体肺炎哪项说法正确A、肺炎支原体只是通过直接毒性作用造成对人体的损害
存款准备金分为法定存款准备金和超额存款准备金。法定存款准备金是金融机构按照其存款
下列哪组药物可能发生竞争性对抗作用A.去甲肾上腺素与异丙肾上腺素 B.组胺与5
能清热解毒、燥湿,无论在上在下、在里在表均可选用的药物是A.连翘 B.玄参
下列不属于企业内部招聘渠道的是( )。A.人力资源数据库检索 B.对曾经在企
最新回复
(
0
)