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
2024-01-30
30
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] 【C7】
选项
答案
N
解析
此处应为修饰成分,可为名词、形容词或动词的分词。从破折号前的ethical and practical considerations可以知道空白处提到的原因可能有悖伦理标准,即并非处于医学上的需要而使用了这种技术,由此可见,nonmedical是本题答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3408139.html
相关试题推荐
Intheolddays,childrenwerefamiliarwithbirthanddeathaspartoflife
Intheolddays,childrenwerefamiliarwithbirthanddeathaspartoflife
[originaltext]Honduranauthoritiesdevotedtotheprotectionofchildrenan
Teachingchildrentoreadwellfromthestartisthemostimportanttaskof
Teachingchildrentoreadwellfromthestartisthemostimportanttaskof
Teachingchildrentoreadwellfromthestartisthemostimportanttaskof
[originaltext]Whenparentsandteachersofyoungchildrentalkaboutthene
[originaltext]DoctorsforchildrenfromtheU.S.Universityhavetakenalo
[originaltext]DoctorsforchildrenfromtheU.S.Universityhavetakenalo
[originaltext]DoctorsforchildrenfromtheU.S.Universityhavetakenalo
随机试题
Iwasso______whenIusedtheautomaticcheckoutlaneinthesupermarketfort
[originaltext]Todaywecontinueourseriesonecologyandconservationwith
DuringMcDonald’searlyyearsFrenchfriesweremadefromscratcheveryday.
某工地施工过程中,一工人李某在搬运材料时,不慎从二楼脚手架跌落,被钢筋穿胸而过,
某社区年均人口为10万,年内共死亡150人,其中60岁以上死亡100人,在全部死
5岁男孩,高热7天,皮肤黏膜损害3天入院。体检:热病容,反应良好。结膜充血,唇和
机体内环境是指A.细胞内液B.细胞外液C.血浆D.组织液E.淋巴液
早期新文化运动的主要功绩在于 A.沉重打击了封建正统思想的权威 B.批判了资
案例九:一般资料。求助者,女性,20岁,某大学二年级学生。 案例介绍:求助者从
根据《必须招标的工程项目规定》,下列项目属于必须招标的有()。A.使用国有企业
最新回复
(
0
)