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
2024-02-03
5
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:https://tihaiku.com/zcyy/3417996.html
相关试题推荐
Teachingchildrentoreadwellfromthestartisthemostimportanttaskof
Teachingchildrentoreadwellfromthestartisthemostimportanttaskof
Childrenwhospendmorethantwohoursadayatacomputerorwatchingtelev
Childrenwhospendmorethantwohoursadayatacomputerorwatchingtelev
Childrenwhospendmorethantwohoursadayatacomputerorwatchingtelev
Tallmenaremorelikelytohavechildrenthantheirverticallychallengedf
Childrenwhospendmorethantwohoursadayatacomputerorwatchingtelev
Childrenwhospendmorethantwohoursadayatacomputerorwatchingtelev
Childrenwhospendmorethantwohoursadayatacomputerorwatchingtelev
Childrenwhospendmorethantwohoursadayatacomputerorwatchingtelev
随机试题
[originaltext]M:Iguesswe’llhaveahotsummeragain.W:Iknow.Lastsummer
[originaltext]M:Thoughshouldchocolateloverseverywhereherejoicingtoday,
以下( )不属于健康状况信息。A.个人疾病史 B.体检信患 C.生化指标
关于基金销售机构的职责规范,以下说法正确的是()。A.基金募集申请获证监会核准
独活具有的功效是A:活血 B:行气 C:化痰 D:泻下 E:解表
急性阿米巴痢疾粪便内可查到A.滋养体B.核包囊C.四核包囊D.A+BE.A+C
共用题干 某物业管理项目经理工作一段时间后发现所管物业项目主要存在以下问题:①
关于情绪和情感关系的说法,正确的是()。A.情绪一般与个体的社会需要能被满足
下列各项中,属于审计工作底稿通常包括的内容有()。A.询证函回函 B.管理建
对于一般用户而言,清除病毒一般使用杀毒软件进行。()
最新回复
(
0
)