首页
登录
职称英语
Once they decided to have children, MiShel and Carl Meissner tackled the nex
Once they decided to have children, MiShel and Carl Meissner tackled the nex
游客
2024-02-17
46
管理
问题
Once they decided to have children, MiShel and Carl Meissner tackled the next big issue: Should they try to have a girl? It was no small matter. MiShel’s brother had become blind from a hereditary condition in his early 20s, and the Meissners had learned that the condition is a【1】passed from mothers to sons. If they had a boy, he would have a 50 per cent chance of having the condition. A girl would be【2】.
The British couple’s inquiries about gender selection led them in 1999 to Virginia, US where a new sperm (精子)-separation technique, called MicroSort, was under【3】. When MiShel became pregnant, she gave birth to a daughter. They will try to have a second daughter using the technique later this year.
The technique separates sperm into two groups—those that carry the X-chromosome (producing a female baby) and those that carry the Y-chromosome (producing a male baby). The technology was developed in 1990s, but last month’s opening of a laboratory in California【4】the company’s first expansion.
"We believe the number of people who want this technology is greater than those who have【5】to it," said Keith L. Blauer, the company’s clinical director.
This is not only a【6】effective way to select a child’s gender. It also brings a host of ethical (伦理的) and practical considerations—especially for the majority of families who use the technique for【7】reasons.
The clinic offers sex selection for two purposes: to help couples avoid passing on a gender-linked【8】disease and to allow those who already have a child to "balance" their family by having a baby of the opposite sex.
The technology is still【9】. However, Blauer says the company has an impressive success rate: 91 per cent of the women who become pregnant after sorting for a girl are successful, while 76 per cent who sort for a boy and get pregnant are successful.
The technique separates sperm based on the fact that the X-chromosome is larger than the Y-chromosome. A machine is used to【10】the size differences and sort the sperm accordingly. The result is then checked using another type of DNA analysis to ensure that it contains mostly X-or Y-bearing sperm. The desired sample is then used for artificial insemination (授精) or test tube fertilization.
A. genetic B. overlapped C. marked D. unaffected
E. perpetually F. investigation G. access H. feat
I. disorder J. gropes K. experimental L. seemingly
M. elicit N. nonmedical O. distinguish [br] 【9】
选项
答案
K
解析
此处应为形容词或动词的分词,作句子的表语。从本句中的still和下句However引出的内容可以知道,这种技术虽然成功率很高,但研究仍没有定论,因此本题答案应为experimental,表明技术仍处于“试验阶段”。在形容词词库中,nonmedical也可用于形容technology,但很明显,本文提到的技术就是与医学有关的,所以不选。
转载请注明原文地址:https://tihaiku.com/zcyy/3459793.html
相关试题推荐
Teachingtodaydemandsmorethanjustcaringaboutchildrenandknowingone’
Teachingtodaydemandsmorethanjustcaringaboutchildrenandknowingone’
Teachingtodaydemandsmorethanjustcaringaboutchildrenandknowingone’
Teachingtodaydemandsmorethanjustcaringaboutchildrenandknowingone’
Teachingtodaydemandsmorethanjustcaringaboutchildrenandknowingone’
Teachingtodaydemandsmorethanjustcaringaboutchildrenandknowingone’
[originaltext]Margaret,marriedwithtwosmallchildren,hasbeenworkingf
[originaltext]Margaret,marriedwithtwosmallchildren,hasbeenworkingf
[originaltext]ToomuchTV-watchingcanharmchildren’sabilitytolearnand
InbothChinaandDenmarkchildrenare【S1】______andtheyreceiveagreatdea
随机试题
Firecanhelppeopleinmanyways.Btuitcanalsobeveryharmful(有害的).Fir
TodayIwouldliketotellyouabouttheeffectsofoldageonhealth.Actua
西方早有明确规定而在中国古代没有引起注意的医德规范是A.医学人道准则 B.平等
A.正名B.全名C.并开D.脚注E.别名医师处方写知柏,属于
患者女,25岁。近1年来情绪急躁,月经不调,多食但消瘦,脉率>100次/分,甲状
《工程建设项目货物招标投标办法》、《工程建设项目勘察设计招标投标办法》均规定,同
中国证监会颁布的《证券发行上市保荐制度暂行办法》,于()开始实施。A:2004年
下列选项中,()属于半劳动力。A.男子16~17周岁,且具有劳动能力的人
关于中标人对项目进行分包的说法,正确的是()。A.中标人可以根据需要自行转让中标
依据《消防法》的规定,生产、储存和装卸易燃易爆危险物品的工厂、仓库和专用车站、码
最新回复
(
0
)