首页
登录
职称英语
The recent news of the successful cloning of an adult sheep — in which the s
The recent news of the successful cloning of an adult sheep — in which the s
游客
2025-04-08
33
管理
问题
The recent news of the successful cloning of an adult sheep — in which the sheep’s DNA was inserted into an unfertilized sheep egg to produce a lamb with identical DNA — has generated an outpouring of ethical concerns. These concerns are not about Dolly, the now famous sheep, nor even about the considerable impact cloning may have on the animal breeding industry, but rather about the possibility of cloning humans. For the most part, however, the ethical concerns being raised are exaggerated and misplaced, because they are based on erroneous views about what genes are and what they can do. The danger, therefore, lies not in the power of the technology, but in the misunderstanding of its significance.
Producing a clone of a human being would not amount to creating a " carbon copy" — an automaton of the sort familiar from science fiction. It would be more like producing a delayed identical twin. And just as identical twins are two separate people — biologically, psychologically, morally and legally, though not genetically — so to embrace a belief in genetic determinism — the view that genes determine everything about us, and that environmental factors or the random events in human development are utterly insignificant. The overwhelming consensus among geneticists is that genetic determinism is false.
As geneticists have come to understand the ways in which genes operate, they have also become aware of the myriad ways in which the environment affects their "expression". The genetic contribution to the simplest physical traits, such as height and hair color, is significantly mediated by environmental factors. And the genetic contribution to the traits we value most deeply, from intelligence to compassion, is conceded by even the most enthusiastic genetic researchers to be limited and indirect. Indeed, we need only appeal to our ordinary experience with identical twins — that they are different people despite their similarities — to appreciate that genetic determinism is false.
Furthermore, because of the extra steps involved, cloning will probably always be riskier — that is, less likely to result in a live birth — that in vitro fertilization(IVF)and embryo transfer. For example, it took more than 275 attempts before the researchers were able to obtain a successful sheep clone. While cloning methods may improve, we should note tat even standard IVF techniques typically have success rate of less than 20 percent. So why would anyone go to the trouble of cloning? [br] According to the passage, where does the danger of cloning lie in?
选项
A、The power of technology.
B、Ethical and moral issues.
C、The mistaken understanding of its significance.
D、The exact replication of dangerous people.
答案
C
解析
事实细节题。文中首段最后一句“The danger,therefore,has not in the power of the technology,but in the understanding of its significance.”与选项C对应。故答案为C。
转载请注明原文地址:http://tihaiku.com/zcyy/4032400.html
相关试题推荐
Janehastobecome______atmathematicstobesuccessfulasanengineer.A、experie
Recentresearchhasclaimedthatanexcessofpositiveionsintheaircanh
Recentresearchhasclaimedthatanexcessofpositiveionsintheaircanh
Recentresearchhasclaimedthatanexcessofpositiveionsintheaircanh
Inrecentyears,teachersofintroductorycoursesinAsianAmericanstudies
Wearewritingtothemanager______therepairsrecentlycarriedoutattheabove
Recentlyanumberofcaseshavebeenreportedofyoungchildren______aviolenta
Inrecentyears,therehasbeenanincreasingawarenessoftheinadequacies
Inrecentyears,therehasbeenanincreasingawarenessoftheinadequacies
Recentstoriesinthenewspapersandmagazinessuggestthatteachingandres
随机试题
Weagreedtoacceptwhichevertheythoughtwasthebesttouristguide.A、whatever
李某持有乙公司5000股优先股,因公司2017年盈利不佳,本应发放的优先股股息暂
非公开募集基金应当向合格投资者募集,合格投资者累计不得超过()人。A.5
支气管肺癌最常见的早期症状是A.刺激性呛咳 B.胸闷、气急 C.胸痛 D.
2,2,6,30,(),1890A.180 B.210 C.360 D.2
招聘成本效益评估是鉴定招聘效率的一个重要( )。A.方法 B.方式 C.指
根据《疫苗储存和运输管理规范(2017年版)》(国卫疾控发[2017]60号),
冲击地压的防治措施分为防范措施和解危措施两大类。下列措施,可作为解危措施是()
男性,30岁。上呼吸道感染后3天出现颜面浮肿。血压142/94mmHg。尿蛋白(
某女25岁,妊娠3个月,确诊为恶性疟疾,应选用A.氯喹 B.奎宁 C.氯喹+
最新回复
(
0
)