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
2024-02-23
30
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
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/3475003.html
相关试题推荐
Scientificresearchhasrevealedthatthroughouttheanimalworld,communica
Scientificresearchhasrevealedthatthroughouttheanimalworld,communica
Scientificresearchhasrevealedthatthroughouttheanimalworld,communica
Scientificresearchhasrevealedthatthroughouttheanimalworld,communica
Scientificresearchhasrevealedthatthroughouttheanimalworld,communica
Scientificresearchhasrevealedthatthroughouttheanimalworld,communica
Scientificresearchhasrevealedthatthroughouttheanimalworld,communica
Scientificresearchhasrevealedthatthroughouttheanimalworld,communica
Scientificresearchhasrevealedthatthroughouttheanimalworld,communica
Scientificresearchhasrevealedthatthroughouttheanimalworld,communica
随机试题
Itbeganasjustanotherresearchproject,inthiscasetoexaminetheeffec
疫源地消毒方法的选择依据不包括A.消毒剂的性能 B.消毒对象 C.消毒工作人
行业标准由国务院标准化行政主管部门编制计划、组织草拟,统一审批、编号、发布。(
早在七八千年前的新石器时代,我们的先民已经开始制造和使用陶器。
某运输公司有从事营运的客车、货车若干辆。某日因骤降暴雨造成路面积水,行车困难,该
中国商务部研究院信息咨询中心与北京信索信息咨询有限公司联合开展的《2005~20
行业风险评估工作表把风险程度分为()类和()个级别。A.十:七 B.七
某公司只生产一种产品,2011年度销售量为2000件,单位售价为180元,固定
癫痫复杂部分性发作的首选药物是( )。A.地西泮 B.扑米酮 C.丙戊酸钠
()是工程融资的重要依据。A.资金供应计划 B.资金需求计划 C.自己供应
最新回复
(
0
)