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
2023-07-17
26
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【1】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【2】.
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【3】. 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【4】the company’s first expansion.
"We believe the number of people who want this technology is greater than those who have【5】to it," said Keith L. Blauer, the company’s clinical director.
This is not only a【6】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【7】reasons.
The clinic offers sex selection for two purposes: to help couples avoid passing on a gender-linked【8】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【9】. 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【10】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] 【5】
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/2843525.html
相关试题推荐
InbothChinaandDenmarkchildrenare【S1】______andtheyreceiveagreatdea
InbothChinaandDenmarkchildrenare【S1】______andtheyreceiveagreatdea
InbothChinaandDenmarkchildrenare【S1】______andtheyreceiveagreatdea
InbothChinaandDenmarkchildrenare【S1】______andtheyreceiveagreatdea
InbothChinaandDenmarkchildrenare【S1】______andtheyreceiveagreatdea
InbothChinaandDenmarkchildrenare【S1】______andtheyreceiveagreatdea
Justlikechildren,deeroftencrossBritishroadstogettotheotherside.
Justlikechildren,deeroftencrossBritishroadstogettotheotherside.
Justlikechildren,deeroftencrossBritishroadstogettotheotherside.
Justlikechildren,deeroftencrossBritishroadstogettotheotherside.
随机试题
HowtoMakeHamburgersMakinghamburgersisreallyvery
[originaltext]M:Ofthetwohouseswehaveseen,whichonedoyouthinkfitsou
(1)Whentimesaregood,theyarevery,verygoodforconsultants.Butwhent
以下属于民用建筑的是()。A.办公楼 B.住宅 C.体育馆 D.库房
设信道带宽为4200HZ,采用PCM编码,采样周期为125μs,每个样本量化为2
企业价值评估中,信息收集整理是企业价值评估的基础,关于信息收集和筛选的相关性,下
公司重大事项分析主要包括()。 ①公司资产重组 ②公司关联交易 ③公司税
下列有关利润的表述中,正确的是:A.利润总额就是营业利润 B.投资收益不计入营
员工培训与开发体系的构成
在开挖深3m,Ⅰ~Ⅲ级砂土基坑,且地下水位较高时,应优先采用()。A.正铲挖
最新回复
(
0
)