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
2024-01-30
27
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] 【C6】
选项
答案
L
解析
此处应为副词,形容这种新技术有效使用的程度或范围。根据上文描述的个案,可以知道这种技术“看起来”很有用,而在副词词库中,seemingly具有与此相同的意思,因此本题答案为seemingly。
转载请注明原文地址:https://tihaiku.com/zcyy/3408138.html
相关试题推荐
[originaltext]Thereareabout650.000school-agedSyrianrefugeechildreni
[originaltext]BarbaraSandersisawifeandthemotheroftwochildren,age
[originaltext]Millionsofbabiesandchildrencouldsoonbeprotectedagain
PreparingChildrentoBeSafeatCollege[A]Moneycanb
PreparingChildrentoBeSafeatCollege[A]Moneycanb
PreparingChildrentoBeSafeatCollege[A]Moneycanb
PreparingChildrentoBeSafeatCollege[A]Moneycanb
PreparingChildrentoBeSafeatCollege[A]Moneycanb
PreparingChildrentoBeSafeatCollege[A]Moneycanb
WhenEnglishasaforeignlanguageistaughttochildrenattheprimaryand
随机试题
Jimisn’t______,buthedidbadlyinthefinalexamslastsemester.A、gloomyB、d
Jackisvery_________aboutwines.A、awareB、knowledgeableC、learnedD、informed
Areyoulivingyourlifetothefullest?Areyouhappywithwho,what,orwh
Whywork?【C1】______youhaveperiodicallyaskedyourselfthesamequestion,
人们在谈论现在的孩子比过去的孩子聪明,这说明儿童心理发展的特征的( )A.延续
雌二醇结构改造的主要目的是A.增加雌激素活性 B.增加稳定性,可口服 C.改
变电站技改工程竣工验收前施工单位自验收及监理初验内容包括:竣工验收申请时应具备(
观看视频《故宫》片断,回答问题。视频解说内容:紫是古人心中的王者之星,紫薇来自天
在《神农本草经》中已记载的药物是( ) A.党参 B.大黄 C.北沙参
甲的注册申请被批准后,省建设厅向他颁发了注册证书和执业印章。根据规定,甲具有下列
最新回复
(
0
)