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
74
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
ThenRedibegantogatherandrecordfactstofindoutifhishypothesiswascor
Inthe1990s,DemiMoorewasamajormoviestarand,asthewifeofBruceWi
银行网点机构营销渠道的分类主要包括()。A.高端化网点机构营销渠道 B.网
下列做法中不体现医患之间的契约关系的是A:患者挂号接受诊疗 B:医生向患者作出
下列关于氯喹的正确叙述是A.对疟原虫各期都有作用 B.对疟原虫的红内期有杀灭作
下列函数在区间[-1,1]上满足罗尔定理条件的是( )。 A. B.f
()是指用一定的临界点将考评得分划分为若干等级,并对此进行评价的方法。A
想象活动的基本成分是( )A.概念 B.表象 C.语词 D.动作
2021年3月28日,中共中央办公厅印发了《中国共产党组织处理规定(试行)》(以
在直方图中质量特性数据分布偏下限,易出现(),在管理上必须提高总体能力。A.不
最新回复
(
0
)