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
2024-02-17
16
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【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 [br] 【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://tihaiku.com/zcyy/3459790.html
相关试题推荐
Teachingtodaydemandsmorethanjustcaringaboutchildrenandknowingone’
Teachingtodaydemandsmorethanjustcaringaboutchildrenandknowingone’
Teachingtodaydemandsmorethanjustcaringaboutchildrenandknowingone’
Teachingtodaydemandsmorethanjustcaringaboutchildrenandknowingone’
Teachingtodaydemandsmorethanjustcaringaboutchildrenandknowingone’
Teachingtodaydemandsmorethanjustcaringaboutchildrenandknowingone’
[originaltext]Margaret,marriedwithtwosmallchildren,hasbeenworkingf
[originaltext]ToomuchTV-watchingcanharmchildren’sabilitytolearnand
[originaltext]ToomuchTV-watchingcanharmchildren’sabilitytolearnand
InbothChinaandDenmarkchildrenare【S1】______andtheyreceiveagreatdea
随机试题
[audioFiles]audio_eusm_j01_316(20099)[/audioFiles]A、Mr.White’sreasonforleav
PassageTwo[br]HowtodescribeChaplin’sperformingstyleaccordingtoParas.
Marketplaceorpeer-to-peer(P2P)lendingmatchesborrowersandlendersonlow
异常吞咽可形成A.上颌前突,下颌后缩,开 B.上颌前突,下颌前突,开 C.上
2003年至2011年,累计完成全社会固定资产投资()亿元。A.
下列各项,不主气血两虚证的脉象是()A.缓脉 B.细脉 C.微脉 D
接种卡介苗的注射部位为()。A.三角肌 B.股外侧 C.三角肌下缘 D.前
简述幼儿安全教育实施的原则。
泻黄散配伍防风的用意是A.散结疏脾 B.理气健脾 C.调气健脾 D.升散脾
期货价格真实地反映供求及价格变动趋势,具有较强的预期性、连续性和公开性,所以在期
最新回复
(
0
)