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
2024-01-26
34
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/3396210.html
相关试题推荐
PreparingChildrentoBeSafeatCollege[A]Moneycanb
PreparingChildrentoBeSafeatCollege[A]Moneycanb
PreparingChildrentoBeSafeatCollege[A]Moneycanb
PreparingChildrentoBeSafeatCollege[A]Moneycanb
PreparingChildrentoBeSafeatCollege[A]Moneycanb
PreparingChildrentoBeSafeatCollege[A]Moneycanb
PreparingChildrentoBeSafeatCollege[A]Moneycanb
[originaltext]Whencouplesgetmarried,theyusuallyplantohavechildren.Som
[originaltext]Whencouplesgetmarried,theyusuallyplantohavechildren.Som
[originaltext]Threeyearsago,after20childrenand6adultswereshotdeadat
随机试题
WhyhasTheCenterforEducationalProgressinvitedDr.Handy?TheCenterhasin
根据《软件可靠性和可维护性管理GB/T14394—2008》,在软件开发各阶段
针对知识分子的健康教育,宜采用哪些技巧?A.技能传授 B.知识传播 C.趣味
新投运或维修后构支架的巡视项目包括构支架无异常倾斜、变形,防腐涂层无脱落、构支架
我国古代科技在宋代有划时代的发展,其中在火药方面的突出表现为( )。A.开始用于
即期汇率是指买卖外汇双方成交当天或()天内进行交割的汇率。 A.2B.3
某公司生产所需的零件全部通过外购取得,公司根据扩展的经济订货量模型确定进货批量。
甲股份有限公司董事会由10名董事组成,赵某任董事长,李某任副董事长。在经营过程中
关于轻质隔墙轻钢龙骨罩面板自攻螺钉施工工艺的说法,正确的是()。A.间距为
第三度房室传导阻滞,反复发作阿-斯综合征,最适宜的治疗是 A.安装人工心脏起
最新回复
(
0
)