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
2023-06-28
52
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] 【C10】
选项
答案
O
解析
空白处应为原形动词。该句中的size differences和sort都表明机器起到“筛选”、“分辨”的作用,因此本题答案为distinguish。
转载请注明原文地址:http://tihaiku.com/zcyy/2788846.html
相关试题推荐
DevelopHealthyEatingHabitsinYourChildrenA)Whatdoyouthinkyour
DevelopHealthyEatingHabitsinYourChildrenA)Whatdoyouthinkyour
DevelopHealthyEatingHabitsinYourChildrenA)Whatdoyouthinkyour
DevelopHealthyEatingHabitsinYourChildrenA)Whatdoyouthinkyour
DevelopHealthyEatingHabitsinYourChildrenA)Whatdoyouthinkyour
Inbringingupchildren,everyparentwatcheseagerlythechild’sacquisitio
Inbringingupchildren,everyparentwatcheseagerlythechild’sacquisitio
It’snosecretthatmanychildrenwouldbehealthierandhappierwithadopti
It’snosecretthatmanychildrenwouldbehealthierandhappierwithadopti
It’snosecretthatmanychildrenwouldbehealthierandhappierwithadopti
随机试题
ThethirdofMarch,1887,threemonthsbeforelwassevenyearsold,wasthe
Modemtechnologyhasabiginfluenceonourdailylife.Newdevicesarewide
[originaltext]"I’mseventyyearsold,"saysthegray-hairedladyproudlyto
小学美术《可爱的动物》
A.恐惧症 B.强迫症 C.躯体化障碍 D.高血压病 E.抑郁症情绪低落
患者,女,41岁,GIP1。月经量多,经期延长,血红蛋白78g/L。妇检:宫颈中
治疗支气管哮喘轻度发作宜选用A.氢化可的松静脉滴注 B.氨茶碱口服 C.氨茶
以下有关建设工程设计方案的说法错误的是()。A.建设工程设计方案报送和审定
张三为中天公司调试某设备,双方约定,如果因张三的原因造成损失,张三只需要承担10
(2017年真题)根据物权法律制度的规定,下列各项中属于独立物权的是()。
最新回复
(
0
)