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
2023-07-02
58
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【C1】______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【C2】______.
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【C3】______. 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【C4】______the company’s first expansion.
"We believe the number of people who want this technology is greater than those who have【C5】______to it," said Keith L. Blauer, the company’s clinical director.
This is not only a【C6】______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【C7】______reasons.
The clinic offers sex selection for two purposes: to help couples avoid passing on a gender-linked【C8】______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【C9】______. 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【C10】______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] 【C5】
选项
答案
G
解析
此处应为名词,可与have和to搭配成have n.to sth.的词组。根据搭配的要求在名词词库中寻找,可以发现access为本题答案。have access to…意为“有权/能够使用”。
转载请注明原文地址:https://tihaiku.com/zcyy/2801725.html
相关试题推荐
Weoftenpassonlittlebitsofinformationtoourchildren,notknowingif
Weoftenpassonlittlebitsofinformationtoourchildren,notknowingif
Weoftenpassonlittlebitsofinformationtoourchildren,notknowingif
Weoftenpassonlittlebitsofinformationtoourchildren,notknowingif
[originaltext]Whencouplesgetmarried,theyusuallyplantohavechildren.
[originaltext]Whencouplesgetmarried,theyusuallyplantohavechildren.
[originaltext]Whencouplesgetmarried,theyusuallyplantohavechildren.
[originaltext]ChildrenintheUnitedStatesareexposedtomanyinfluences
[originaltext]ChildrenintheUnitedStatesareexposedtomanyinfluences
[originaltext]W:It’sreallyabigproblemtoteachourchildrenhowtobehave.
随机试题
NarratorListentopartofalectureinabiologyclass.Nowgetreadytoanswer
【S1】[br]【S9】and∧by→that此处考查句子结构。It是形式主语,真正的主语是由that引导的从句,但注意此处是由and连接的并列主语从句
Corporationsasagroupofferavarietyofjobs.Mostlargecompaniessendp
ThedevelopmentoftheSemanticWebproc
伦理学中的义务与政治法律中的义务之不同点在于前者是A.个人对他人,对社会应负的道
治疗支饮寒饮伏肺证宜选用A.柴枳半夏汤 B.香附旋覆花汤 C.小青龙汤 D
胆色素中无色物质是A.胆红素B.胆绿素C.胆素原D.尿胆素E.粪胆素
建设项目的环境影响评价文件自批准之日起超过()年,方决定该项目开工建设的,其环
(2021年真题)根据增值税法律制度的规定,下列各项中,不计入增值税销售额的有(
关于强制性标准监督检查的内容,下列表述不符合《实施工程建设强制性标准监督规定》的
最新回复
(
0
)