首页
登录
职称英语
It happened one morning 20 years ago. British scientist Alec Jeffrey stumble
It happened one morning 20 years ago. British scientist Alec Jeffrey stumble
游客
2023-09-03
64
管理
问题
It happened one morning 20 years ago. British scientist Alec Jeffrey stumbled upon DNA fingerprinting: He identified the patterns of genetic(基因的) material that are unique to almost every individual. His discovery changed everything from the way we do criminal investigations to the way we decide family law. But the professor of genetics at the University of Leicester, UK, is still surprised, and a bit worded, by the power of the technology he released upon the world.
The patterns within DNA are unique to each individual, except identical twins, who share the same pattern. The ability to identify these patterns has been used to convict murderers and to clear people who are wrongly accused. It is also used to identify the victims of war and settle disputes over who is the father of a child.
Jeffrey said he and his colleagues made the discovery by accident while tracking genetic variations. But, within six months of the discovery, genetic fingerprinting had been used in an immigration case, to prove that an African boy really was his parents’ son. In 1986, it was used for the first time in a British criminal case: It cleared one suspect after being accused of two rapes and murders and helped convict another man.
DNA testing is now very common. In Britain, a national criminal database established in 1995 now contains 2.5 million DNA samples(样本). The U.S. and Canada are developing similar systems. But there are fears about the stored DNA samples and how they could be used to harm a person’s privacy. That includes a person’s medical history, racial origin or psychological profile. "There is the long-term risk that people can get into these samples and start getting additional information about a person’s paternity or risk of disease," Jeffrey said.
DNA testing is not an unfailing proof of identity. Till, it is considered a reasonably reliable system for determining the things it is used for. Jeffrey’s estimates(估计) the probability of two individuals’ DNA profiles matching in the most commonly used tests at between one in a billion or one in a trillion.
选项
A、the discovery of fingerprinting by Jeffery
B、the practice of fingerprinting in court
C、the fingerprinting in the present situation
D、the merits and demerits of fingerprinting
答案
D
解析
文章主旨题。这一题涉及到整篇文章的大体内容,A,B,C三个选项的内容在文中都有涉及,但是文章的主旨并不在于单单说明这几点。我们从后面的文章中可以看到,DNA指纹的发现既有它的好处也有它的坏处,因此,答案是D。
转载请注明原文地址:http://tihaiku.com/zcyy/2980680.html
相关试题推荐
Ifyoushouldstartearlytomorrowmorning,______(可能黄昏时就能到达目的地).youwould/migh
Onecorrespondenthappenedtoaskthearchitect__________(摩天大楼是否能承受大飞机的撞击)。whe
[originaltext]Americanscientistsaredevelopingmapsthatcanidentifyare
[originaltext]Americanscientistsaredevelopingmapsthatcanidentifyare
ScientistshavelongbelievedonewaytostoptheEarth’satmospherefromw
ScientistshavelongbelievedonewaytostoptheEarth’satmospherefromw
ManyleadingscientistsdownthroughtheyearsfromGalileotoEinsteinhave
Scientistshavecomeupwithatheoryforwhytimeflieswhenyonarehaving
Scientistshavecomeupwithatheoryforwhytimeflieswhenyonarehaving
Scientistshavecomeupwithatheoryforwhytimeflieswhenyonarehaving
随机试题
Mysister______likemymother.A、lookB、looksC、lookingB
[img]2012q2/ct_etoefm_etoeflistz_0588_20124[/img][br]Iseachofthesetrueabo
Whatbusinessdoesthecompanydo?Itsells______.[br]Whatshouldthecom
(1)AfewmonthsagoIwasnominatedforGovernorofthegreatstateofNewY
可以说,成本计划时目标成本的一种形式。
C
人体生理功能的调节方式有__________、___________和自身调节三
患者,男性,30岁。口角歪向右侧,左眼不能闭合2天,左侧额纹消失,治疗应选取何经
2020年我国农产品贸易额2468.3亿美元,同比增8.0%。其中,出口额同比减
美国公司将于3个月后交付货款100万英镑,为规避汇率的不利波动,可()做套期保
最新回复
(
0
)