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
53
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
【C5】
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://kaotiyun.com/show/MvY7777K
0
大学英语四级
相关试题推荐
We’renowwitnessingtheemergenceofanadvancedeconomybasedoninformationandknowledge.Physical【B1】_______,rawmaterials
Forthispart,youareallowed30minutestowriteanannouncementtowelcomestudentstojointheEnglishCultureWeekheldby
MobilePhonesintheClassForthispart,youareallowed30minutestowriteashortessay.Youshouldstartyouressaywitha
A、Itisveryhotoutsidetheroom.B、Theairconditionermakestheroomhot.C、Hefedthepigjustnow.D、Hedidmorningexercis
A、Disappointed.B、Terrible.C、Enjoyable.D、Tired.C
OliviaPedersenthoughttheNissanLeafparkedoutsideherfavoritelunchspotnearEmoryUniversity,mustbehers.Butshecoul
BullyingandChildrenA)Whatyoursonisdescribingisbullying,plainandsimple.Althoughitislateintheschoolyear,yous
Accordingtonewgovernmentfigures,pollutionlevelsarerisingagainafterseveralyearsofgradualdecline.Data【C1】_____
Accordingtonewgovernmentfigures,pollutionlevelsarerisingagainafterseveralyearsofgradualdecline.Data【C1】_____
Accordingtonewgovernmentfigures,pollutionlevelsarerisingagainafterseveralyearsofgradualdecline.Data【C1】_____
随机试题
我国劳动法不适用于在我国境内的外商独资企业。()
A、Doctorsandnurses.B、Findingahospitalteacher.C、Theschoolteacher.D、Newmedicalinstruments.B从“Mostchildreninterviewe
细菌大量入血并繁殖,称为
向一孤僻、忧郁、被动的患者讲明,每当能主动接触人,与人亲切交谈时,就给他几枚代币。他可用代币换取他所喜爱的物品。经过一段时间,患者原有症状逐渐消失。这种疗法是
慢性肺源性心脏病的心脏形态改变主要是
保证通信线路及其配套设施的安全,应采取的保护要求包括()。
与团队旅游相比,散客旅游的预订期()。
打开考生文件夹下的演示文稿yswg.pptx,按照下列要求完成对此文稿的修饰并保存。将第二张幻灯片版式改为“两栏内容”,标题为“项目计划过程”。将第四张幻灯片左侧图片移到第二张幻灯片右侧内容区,并插入备注:“细节将另行介绍”。将第一张幻灯片版式改为“比
A、Inanairplane.B、Inarestaurant.C、Inahotel.D、Inastore.CM:What!Tenminutesagoyoutoldmetherewerenorooms.You
京剧是中国戏曲中影响力最大的一支。京剧人物角色以性别、年龄、身份和个性为基础进行区分。主要有四大行当(charactertype),分别是生、旦、净、丑。“生”是一个男性角色,进一步细分为老生、小生和武生(martialSheng)。“旦”指各种女性角
最新回复
(
0
)