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
2024-01-29
28
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/3405107.html
相关试题推荐
在这次表演中,所有的孩子都盛装打扮,轮流唱歌跳舞。Duringtheperformance,allthechildrenweredressedup
[originaltext]BarbaraSandersisawifeandthemotheroftwochildren,age
[originaltext]BarbaraSandersisawifeandthemotheroftwochildren,age
Ifchildrencouldstepintotheshoesofavictimofbullying,wouldtheybe
InasmallschoolontheSouthSideofChicago,40childrenbetweentheages
InasmallschoolontheSouthSideofChicago,40childrenbetweentheages
InasmallschoolontheSouthSideofChicago,40childrenbetweentheages
InasmallschoolontheSouthSideofChicago,40childrenbetweentheages
InasmallschoolontheSouthSideofChicago,40childrenbetweentheages
InasmallschoolontheSouthSideofChicago,40childrenbetweentheages
随机试题
Completethesentencesbelow.ChooseNOMORETHANTWOWORDSfromthepassagefor
______istheofficialresidenceofBritishPrimeMinister.A、No.10DowningStree
EightStepstoWritingaGreatPaperI.Startassoonaspossible—Usuallyyou
Thenewbuilding______alltheotherbuildingsinthetown.A、dwarfsB、distortsC、
Afterthewar,heworkedonanislandinthePacific,helpingthenativesandme
Muchtimeandefforthasbeendedicatedtoresearchingthementalhealthben
下列不属于工程量索赔的必要条件有()。A.建设单位不同意签证或不完全签证 B
搭设高度超过规范要求的脚手架应编制专项施工方案,基础、连墙件应经设计计算。专项施
肝性脑病前驱期的主要表现是A、意识错乱 B、昏迷 C、扑翼样震颤 D、昏睡
患者咽中如有物阻,咯吐不出,吞咽不下,胸膈痞闷,舌苔白腻,脉弦滑。治宜A.厚朴温
最新回复
(
0
)