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
2024-01-29
38
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] 【C10】
选项
答案
O
解析
空白处应为原形动词。该句中的size differences和sort都表明机器起到“筛选”、“分辨”的作用,因此本题答案为distinguish。
转载请注明原文地址:https://tihaiku.com/zcyy/3405112.html
相关试题推荐
Ifyouwanttoteachyourchildrenhowtosaysorry,youmustbegoodatsayi
[originaltext]TwoFrenchschoolchildrenandaUkrainiantouristhavebeenk
Manyparentsmaythinkthateachnewsibling(兄弟姐妹)offerstheirchildrenthe
Manyparentsmaythinkthateachnewsibling(兄弟姐妹)offerstheirchildrenthe
Manyparentsmaythinkthateachnewsibling(兄弟姐妹)offerstheirchildrenthe
Manyparentsmaythinkthateachnewsibling(兄弟姐妹)offerstheirchildrenthe
[originaltext]M:HiTracy!Whatdoyouthinkofourclassonchildren’sliterat
[originaltext]M:HiTracy!Whatdoyouthinkofourclassonchildren’sliterat
[originaltext]M:HiTracy!Whatdoyouthinkofourclassonchildren’sliterat
[originaltext]OPEChasdecidedthiswasnotthetimeforcuttingpetroleum
随机试题
OnecountrythatiscertainoftheeffectoffilmsontourismisAustralia.
Forthispart,youareallowed30minutestowriteacompositionaboutmorality.
Humorcanreducedistressandunhappiness______(通过营造欢快友好的气氛).bycreatingaple
[originaltext]M:Whatareyouworkingonatthemoment,Beth?W:(19)I’mmaking
《商业银行法》规定,商业银行贷款余额与存款余额的比例()。A.不得低于75%
简述现代企业人力资源管理各个历史发展阶段的特点。
20世纪90年代末,以微电子、网络技术、计算机和通信为代表的信息产业每年以(
下列物业管理表决事项中,须经专有部分占全部专有部分面积2/3以上的业主且占总人数
在我国财政收入分类中,非税收入包括()。A.彩票公益金 B.行政事业性收费
急性一氧化碳中毒时,尽早采用高压氧治疗的主要作用是A.加速HbCO的解离 B.
最新回复
(
0
)