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
2023-06-29
62
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:http://tihaiku.com/zcyy/2791871.html
相关试题推荐
PreparingChildrentoBeSafeatCollege[A]Moneycanb
PreparingChildrentoBeSafeatCollege[A]Moneycanb
PreparingChildrentoBeSafeatCollege[A]Moneycanb
WhenEnglishasaforeignlanguageistaughttochildrenattheprimaryand
WhenEnglishasaforeignlanguageistaughttochildrenattheprimaryand
WhenEnglishasaforeignlanguageistaughttochildrenattheprimaryand
WhenEnglishasaforeignlanguageistaughttochildrenattheprimaryand
[originaltext]Threeyearsago,PunchaMaya,herhusbandandfivechildrenl
[originaltext]Threeyearsago,PunchaMaya,herhusbandandfivechildrenl
[originaltext]Hundredsofchildrenwhowereforcedtoworkin"inhumancon
随机试题
Beingsomewhatshortsighted,shehadthehabitof______atpeople.A、glancingB、
在住宅小区室外照明设计中,下列说法不正确的是( )。A.应采用防爆型灯具 B
在无机结合料稳定土无侧限抗压强度试验中,对中试件,要求每组试件的数目不少于()
根据《建筑工程建筑面积计算规则》GB/T50353—2013,下列关于建筑物雨篷
“通信秘密受法律保护”属于我国公民的()。A、政治自由权利 B、文化教育权利
血清免疫球蛋白测定中,不属多克隆增高的疾病是()A.类风湿性关节炎 B.
从总的方面来说,患者享有的保密权有两大内容A.不良诊断和不良预后 B.个人隐私
下列哪项属于慢性心力衰竭的基本病因A.感染 B.心律失常 C.体力活动 D
多年成功经营的丰盛纺织集团收购了某国一家频临破产的纺织厂,并组织该厂管理人员到集
某10kV变电所,10kV系统中性点不接地 该变电所水平布置三相63mmx6
最新回复
(
0
)