首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Once they decided to have children, MiShel and Carl Meissner tackled the next big issue: Should they try to have a girl? It was
Once they decided to have children, MiShel and Carl Meissner tackled the next big issue: Should they try to have a girl? It was
admin
2016-10-07
49
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
【C2】
选项
答案
D
解析
此处应为动词的分词形式或形容词,表示女孩的状态。根据该段对这种遗传病的描述可以知道生女孩可以避免遗传到这种病,因此,空白处的单词应该表明“没事”、“不受影响”等,因此本题答案为unaffected。
转载请注明原文地址:https://kaotiyun.com/show/SvY7777K
0
大学英语四级
相关试题推荐
We’renowwitnessingtheemergenceofanadvancedeconomybasedoninformationandknowledge.Physical【B1】_______,rawmaterials
We’renowwitnessingtheemergenceofanadvancedeconomybasedoninformationandknowledge.Physical【B1】_______,rawmaterials
Writeashortessaybasedonthepicturebelow.YoushouldstartyouressaywithabriefaccountofCampusActivitiesandthene
EndangeredPeoplesA)Today,itisnotdistance,butculturethatseparatesthepeoplesoftheworld.Thecentralquestionofour
EndangeredPeoplesA)Today,itisnotdistance,butculturethatseparatesthepeoplesoftheworld.Thecentralquestionofour
EndangeredPeoplesA)Today,itisnotdistance,butculturethatseparatesthepeoplesoftheworld.Thecentralquestionofour
OliviaPedersenthoughttheNissanLeafparkedoutsideherfavoritelunchspotnearEmoryUniversity,mustbehers.Butshecoul
BullyingandChildrenA)Whatyoursonisdescribingisbullying,plainandsimple.Althoughitislateintheschoolyear,yous
Accordingtonewgovernmentfigures,pollutionlevelsarerisingagainafterseveralyearsofgradualdecline.Data【C1】_____
Accordingtonewgovernmentfigures,pollutionlevelsarerisingagainafterseveralyearsofgradualdecline.Data【C1】_____
随机试题
阮籍《咏怀》诗忧愤深广,后人评为【】
Tobe,ornottobe—thatisthequestion;Whether’tisnoblerinthemindtosufferTheslingsandarrowsofoutrageousfortun
A地块为规划科学教育用地,宗地面积为30000平方米。经调查了解取得下列资料:该宗地所在区域征地补偿费为500元/平方米,征地管理费按规定以征地补偿费的2%计算,土地开发费为600元/平方米,税费按15元/平方米计取。土地开发周期为两年,开发资金在开发期
简述构建社会主义和谐社会的基本内容和必要性。
《建设项目环境影响评价资质管理办法》规定:评价机构有( )所列行为之一的,国家环境保护总局视情节轻重,分别给予警告、通报批评、责令限期整改3~12个月、缩减评价范围、降低资质等级或者取消评价资质。
目标分解结构与组织分解结构之间存在对应关系,因此目标分解结构()。
甲公司采用成本与可变现净值孰低计量期末存货,按单项存货计提存货跌价准备。2010年12月31日,甲公司库存自制半成品成本为35万元,预计加工完成该产品尚需发生加工费用11万元,预计产成品不含增值税的销售价格为50万元,销售费用为6万元。假定该库存自制半成品
最高管理者可根据组织的实际情况,可指定一名或几名管理者代表来行使被授权的职责,则管理者代表的主要职责是_______。
主张对儿童的教育要“诱之歌诗”、“导之以礼”、“讽之读书”的人物是
第二次国内革命战争即土地革命战争,土地革命战争的发展依赖于土地革命的进行。开展土地革命的目的是()
最新回复
(
0
)