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
74
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
【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://kaotiyun.com/show/rvY7777K
0
大学英语四级
相关试题推荐
A、Theycarealotaboutchildren.B、Theyneedlookingafterintheiroldage.C、Theywanttoenrichtheirlifeexperience.D、The
Forthispart,youareallowed30minutestowriteacomplaintletterinthenameofLiMing.Youshouldwriteatleast120words
Forthispart,youareallowed30minutestowriteashortessay.Youshouldstartyouressaywithabriefdescriptionofthepi
EndangeredPeoplesA)Today,itisnotdistance,butculturethatseparatesthepeoplesoftheworld.Thecentralquestionofour
Mostpeoplewouldagreethat,althoughourageexceedsallpreviousagesinknowledge,therehasbeennocorrelativeincreasein
A、Surprised.B、Disappointed.C、Self-confident.D、Hesitating.C
Accordingtonewgovernmentfigures,pollutionlevelsarerisingagainafterseveralyearsofgradualdecline.Data【C1】_____
Accordingtonewgovernmentfigures,pollutionlevelsarerisingagainafterseveralyearsofgradualdecline.Data【C1】_____
A、Itwasexciting.B、Itwasamusing.C、Itwassurprising.D、Itwasquiteboring.B
随机试题
下列工程中,不属于《注册建造师执业管理办法(试行)》规定的机电工程注册建造师执业工程范围的是()。
某股份有限公司董事会有9名董事。该公司召开董事会会议,甲、乙、丙、丁、戊5名董事出席,其余4名董事缺席。会议表决前,丁因故提前退席,亦未委托他人代为表决。会议最终由4名董事一致作出一项决议。根据公司法律制度的规定,下列关于该决议法律效力的表述中,正确的是(
借助栈(可用栈的基本运算)来实现单链表上的逆置运算。
此时应考虑最可能的诊断为进一步处理不应是
根据中国国际经济贸易仲裁委员会的仲裁规则,下列关于独任仲裁员的选任的描述,哪些是符合规定的:
我国商业银行监管当局借鉴国际先进经验,提出了商业银行公司治理的要求,以下不属于该要求的是()。
员工与企业工作岗位之间的匹配包括()。
根据市场组织形式的不同,可以将证券市场划分为()。
()是国家为公民进入教师行业设置的第一道门槛,只有具备法定条件和专业能力,经认定合格的人方可取得相应的任职资格。
曾受到有期徒刑刑事处罚的顾某申请获取教师资格证。下列选项中正确的是()
最新回复
(
0
)