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
2012-12-26
25
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【1】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【2】.
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【3】. 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【4】the company’s first expansion.
"We believe the number of people who want this technology is greater than those who have【5】to it," said Keith L. Blauer, the company’s clinical director.
This is not only a【6】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【7】reasons.
The clinic offers sex selection for two purposes: to help couples avoid passing on a gender-linked【8】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【9】. 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【10】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
【6】
选项
答案
L
解析
此处应为副词,形容这种新技术有效使用的程度或范围。根据上文描述的个案,可以知道这种技术“看起来”很有用,而在副词词库中,seemingly具有与此相同的意思,因此本题答案为seemingly。
转载请注明原文地址:https://kaotiyun.com/show/U4w7777K
0
大学英语四级
相关试题推荐
Internetuseappearstocauseadeclineinpsychologicalwell-being,accordingtoresearchatCarnegieMellonUniversity.Evenp
Nuclearscienceshouldbedeveloped______(有益于人民而不是伤害他们).
A、Shehastroublegettingalongwiththeprofessor.B、Sheregretshavingtakenupmuchoftheprofessor’stime.C、Sheknowsthe
A、Theyshouldmeetatthecoffeeshopnow.B、Theyhavetodealwithsomethingurgent.C、Theyarenotabletomeettomorrow.D、Th
Whenyouhavetomeetsomeonefromadifferentculture,beprepared.Ifyouunderstandculturaldifferences,you’llbeabetter
A、Livingalone.B、Gettingdisappointed.C、Lettingtheirparentsdown.D、Askingtheirparentsforletters.C选项均以“动词+ing”开头以及其中的Li
PerhapslikemostAmericansyouhavesomeextrapoundstoshed.Youmayevenhavetriedafad(时尚)dietortwo,butfoundyourse
NewGraduationMath=SuccessforCommunityCollegesTheconceptofcommunitycollegesintheUnitedStatesdevelopedinthe
A、Enterthewateralonewithoutarms.B、Buildstrongfencingatwateringpoints.C、Overfishthewaterswherecrocodileslive.D、
随机试题
Whatisintelligence(智力)anyway?WhenIwasinthearmy【C1】______anintelligencetestthatallsoldierstook,and,against【C2】___
A.原发型肺结核B.血行播散型肺结核C.浸润型肺结核D.慢性纤维空洞型肺结核E.结核性胸膜炎可在肺部形成哑铃形阴影的结核类型是
A.理中丸B.桂枝人参汤C.小建中汤D.大建中汤E.附子理中丸具有温中补虚,和里缓急功效的是
下列关于我国工程造价管理体制改革的最终目标,说法正确的有()。
读图4,回答问题。 与常年相比,自2009年冬至2010年4月底,该区域可能()。
下列有关地役权的表述,正确的是()。
下列有关DSS的叙述中,错误的一条是()。
在窗体上画一个名称为Command1的命令按钮,然后编写如下程序:OptionBase1PrivateSubCommand1_Click()DimaAsVariant
ATheSpeechofthePresiderThepresidingovermeetingsisoneofthecommunicativeactivitiesatinternationalacademicconfer
沪深300股指期货的交割结算价是依据()确定的。
最新回复
(
0
)