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
What has cloning bypassed?
What has cloning bypassed?
admin
2014-09-27
55
问题
What has cloning bypassed?
What is cloning? Cloning is the creation of cells or whole animals using DNA from a single "parent", by passing the normal reproductive process. The clone has the same DNA as the parent.
The most common process takes DNA from one cell and puts it in a hollowed-out egg. Chemicals and electricity are then used to encourage the new DNA to fuse with the egg and develop into an embryo. This technique is called nuclear transfer.
The first cloned animal in human history is a sheep called Dolly. It is very important because it was the first mammal to be cloned using DNA taken from an adult cell. Previously, animals had only been cloned using embryo cells, which already have the potential to become a complete embryo in its own right. The big breakthrough with Dolly was to make a clone from an ordinary, adult cell.
When it comes to the question of whether cloned animals are normal and healthy, the answer is YES. Dolly is, but scientists do not yet know whether this is the exception or the rule. Some early evidence suggests that clones may have health problems and that they may age prematurely.
With the birth of Dolly, many people are worried that a human clone may be born soon. It’s possible in theory. But the technology of reproductive cloning is still in its very early stages and there is much that scientists do not understand. That’s more, human cloning is already banned by law in the United Kingdom. The former President of the United States Bill Clinton proposed banning research into producing human clones in the US for five years. Some measures have also been taken to establish international agreements banning live human clones.
选项
A、The United States
B、The United Kingdom
C、Switzerland
D、Russia
答案
B
解析
信息题。文中提到两个国家,the United Kingdom和the United States,只有英国以法律形式正式禁止克隆人,所以选B。
转载请注明原文地址:https://kaotiyun.com/show/RnRd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
A80-yearoldmanfromCincinnatiinAmericaismakinglegalhistorybysuingdoctorswhosavedhiswife.EdwardWinterhaswitn
Whendidthepersonsufferfromthecomputerrelateddisease?
Eachcompanyhasmany"publics’whoshouldbeablenotonlyrecognizeitsname【21】______tocorrectlyidentifyitsindustrya
AmericanandJapaneseresearchersaredevelopingasmartcarthatwillhelpdriversavoidaccidentsbypredictingwhentheyare
Withthedevelopmentofscienceandtechnology,weknowmuchofglaciers.Foralltheirgreatdiversityofshapesandsizes,gla
CollegesportsintheUnitedStatesareahugedeal.AlmostallmajorAmericanuniversitieshavefootball,baseball,basketball
WhatdoyouknowaboutGeorgeDaniels?
Computersarenowbeingpushedintoschools.Weknowthatmultimediawillmake【21】______easyandfun.Childrenwillhappily
Whathascloningbypassed?
Theaimof"Noah’sArk"projectisto______.WhatcouldbethemajorproblemincloningpandasaccordingtoProfessorKraemer?
随机试题
服务产品的特征有()。
需要频繁启动电动机时,应选用()控制。
流水线生产
左鼻旁疖肿病人,体温38℃,抗生素治疗未见好转。此病人潜在的危险是
下列属于无阈值效应的是
根据《水利工程建设项目施工分包管理规定》,下列关于项目法人分包管理职责叙述正确的是()。
7月份大豆现货价格为5050元/吨,某生产商由于担心9月份收获出售时价格下跌,在期货市场上进行了卖出套期保值操作,以5080元/吨的价格卖出9月份大豆期货合约。8月份,有一经销商愿意购买大豆现货,双方协定以低于9月份大豆期货合约价格10元/吨的价格作为双
经营期现金流量中不能引起公司税前利润变动的有()。
下列哪些行为应认定为抢劫罪一种罪刑()。
就国家与法的关系而言,能影响以至于决定法的形式的最主要因素是()。
最新回复
(
0
)