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
2
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/3408137.html
相关试题推荐
Peopleappeartobeborntocompute.Thenumericalskillsofchildrendevelo
Peopleappeartobeborntocompute.Thenumericalskillsofchildrendevelo
Peopleappeartobeborntocompute.Thenumericalskillsofchildrendevelo
Oncetheydecidedtohavechildren,MiShelandCarlMeissnertackledthenex
Oncetheydecidedtohavechildren,MiShelandCarlMeissnertackledthenex
Oncetheydecidedtohavechildren,MiShelandCarlMeissnertackledthenex
Oncetheydecidedtohavechildren,MiShelandCarlMeissnertackledthenex
Oncetheydecidedtohavechildren,MiShelandCarlMeissnertackledthenex
DevelopHealthyEatingHabitsinYourChildrenA)Whatdoyouthinkyour
DevelopHealthyEatingHabitsinYourChildrenA)Whatdoyouthinkyour
随机试题
Insomecountrieswhereracialprejudiceisacute,violencehassocometob
WhichofthefollowingisNOTaromanticpoet?A、WilliamWordsworth.B、GeorgeEli
ApprenticeshipshavelongbeenpopularinEurope,butworkforce-orientedhig
下图是室内消火栓组成哪一部分()。 A.消防水带 B.消火栓报警按钮
泵站工程施工招标××省某大型泵站工程,初步设计已经批准,建设资金来源已经落实,项
与足太阴相表里的经脉是()A.足厥阴 B.足少阳 C.足阳明 D.手
在过去20年间,世界经济经历了重大变化:新兴市场愈发,许多发
中间业务是指不构成银行表内资产,表内负债,但形成银行非利息收入的业务。()
患者,男性,55岁,咳嗽、咳痰10年,活动时气短2年,慢性支气管炎、肺气肿诊断明
对心理治疗下列定义中哪项是错误的A.良好医患关系为桥梁 B.应用心理学方法
最新回复
(
0
)