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
2024-02-02
20
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/3414072.html
相关试题推荐
必须保证孩子们的安全。Children’ssafetymustbeguaranteed.汉语原句要表达的重点是宾语“孩子们的安全”,而主语无需强调(该句
HalloweenA)OnOctober31st,dozensofchildrendressedincostumesknoc
HalloweenA)OnOctober31st,dozensofchildrendressedincostumesknoc
HalloweenA)OnOctober31st,dozensofchildrendressedincostumesknoc
HalloweenA)OnOctober31st,dozensofchildrendressedincostumesknoc
HalloweenA)OnOctober31st,dozensofchildrendressedincostumesknoc
DevelopHealthyEatingHabitsinYourChildrenA)Whatdoyouthinkyour
DevelopHealthyEatingHabitsinYourChildrenA)Whatdoyouthinkyour
DevelopHealthyEatingHabitsinYourChildrenA)Whatdoyouthinkyour
DevelopHealthyEatingHabitsinYourChildrenA)Whatdoyouthinkyour
随机试题
[originaltext]M:Honey,thebasketballgameisabouttostart.Couldyoubring
Afterthirtyyearsofmarriedhappiness,hecouldstillremindhimselfthat
Therearefivebasicfunctionsofanewspaper:toinform,tocomment,to【B1】
面向对象设计有7个主要原则,()要求一个对象应当对其他对象有尽可能少的了解。A
增强靶组织对胰岛素敏感性的药物是()A.格列奇特(达美康) B.二甲双
深化行政执法体制改革要求健全行政执法和刑事司法衔接机制,支持以罚代刑。( )
某一证券投资者融资买入1000只股票,每股买价为20元,并以每股50元的价格卖出
用正交表L8(27)安排试验时需要做()个不同条件的试验。 A.2B.
小学课外活动的主体是()。
某实行监理的工程,建设单位与总承包单位按《建设工程施工合同(示范文本)》签订了施
最新回复
(
0
)