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
2023-07-01
31
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] 【C8】
选项
答案
A
解析
此处应为修饰成分,可为名词、形容词或动词的分词。从本文首段提到的个案和本句提到的gender-linked可以推断空白处的单词应表明“遗传性”疾病,因此genetic为本题答案。
转载请注明原文地址:https://tihaiku.com/zcyy/2797809.html
相关试题推荐
[originaltext]Byteachingyourchildrenfiresafetyyoucanmakesurethey
[originaltext]Byteachingyourchildrenfiresafetyyoucanmakesurethey
[originaltext]Byteachingyourchildrenfiresafetyyoucanmakesurethey
BullyingandChildrenA)Whatyoursonisdescribingisb
BullyingandChildrenA)Whatyoursonisdescribingisb
BullyingandChildrenA)Whatyoursonisdescribingisb
BullyingandChildrenA)Whatyoursonisdescribingisb
BullyingandChildrenA)Whatyoursonisdescribingisb
Atschoolourchildrenaretaughttoaddupandsubtractbut,extraordinaril
Atschoolourchildrenaretaughttoaddupandsubtractbut,extraordinaril
随机试题
[originaltext]M:Hi,Iamgoingdoortodoortonighttotellpeopleaboutthes
推断统计是研究数据搜集、处理和描述的统计学方法。()
下列哪种食物可在体内造成乳酸堆积、竞争性抑制尿酸排泄A.奶酪 B.咖啡 C.
借款需求与还款能力和风险评估紧密相连,是决定贷款金额、期限、品种等要素的重要因素
为确保施工进度计划能得以实施,施工方除了编制深度不同的控制性和直接指导项目施工的
公路水运工程“平安工地”考核评价遵循“分级管理、属地负责”的原则,考核评价等级有
根据我国《女职工劳动保护规定》,不得安排夜班工作的女职工是A.月经期间的女职工
国家统计局每年发布的统计公报运用许多重要统计指标和数据反映一年来国民经济和社会发
男性,21岁。肉眼血尿伴尿量减少6天入院,2周前曾有发热、咽痛。既往体健。查体:
(2017年真题)某建设项目静态投资20000万元,项目建设前期年限为1年,建设
最新回复
(
0
)