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
考研
It is a wise father that knows his own child, but today a man can boost his paternal(fatherly)wisdom—or at least confirm that he
It is a wise father that knows his own child, but today a man can boost his paternal(fatherly)wisdom—or at least confirm that he
admin
2016-01-05
74
问题
It is a wise father that knows his own child, but today a man can boost his paternal(fatherly)wisdom—or at least confirm that he’s the kid’s dad. All he needs to do is shell out $30 for a paternity testing kit(PTK)at his local drugstore—and another $120 to get the results.
More than 60, 000 people have purchased the PTKs since they first become available without prescriptions last years, according to Doug Fogg, chief operating officer of Identigene, which makes the over-the-counter kits. More than two dozen companies sell DNA tests Directly to the public, ranging in price from a few hundred dollars to more than $2, 500.
Among the most popular: paternity and kinship testing, which adopted children can use to find their biological relatives and families can use to track down kids put up for adoption. DNA testing is also the latest rage among passionate genealogists—and supports businesses that offer to search for a family’s geographic roots.
Most tests require collecting cells by swabbing saliva in the mouth and sending it to the company for testing. All tests require a potential candidate with whom to compare DNA.
But some observers are skeptical. "There is a kind of false precision being hawked by people claiming they are doing ancestry testing," says Troy Duster, a New York University sociologist. He notes that each individual has many ancestors—numbering in the hundreds just a few centuries back. Yet most ancestry testing only considers a single lineage, either the Y chromosome inherited through men in a father’ s line or mitochondrial DNA, which is passed down only from mothers. This DNA can reveal genetic information about only one or two ancestors, even though, for example, just three generations back people also have six other great-grandparents or, four generations back, 14 other great-great-grandparents.
Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared. Databases used by some companies don’t rely on data collected systematically but rather lump together information from different research projects. This means that a DNA database may have a lot of data from some regions and not others, so a person’ s test results may differ depending on the company that processes the results. In addition, the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.
Skeptical observers believe that ancestry testing fails to
选项
A、trace distant ancestors.
B、rebuild reliable bloodlines.
C、fully use genetic information.
D、achieve the claimed accuracy.
答案
D
解析
细节题。从题干信息定位到第五段。第一句There is a kind of false precision being hawkedby people claiming they are doing ancestry testing这句话是对这一段的总结,因此,D选项正确。A、B、C项都只是描述其中的一个方面,均被排除。
转载请注明原文地址:https://kaotiyun.com/show/rtsZ777K
0
考研英语一
相关试题推荐
Afewyearsago,JamesGreenbegantodreadwork.HedraggedhimselfoutofbedeverymorningandploddedthroughNewYork’sPen
AsAmericamovesintothe21stcentury,thechangingcompositionoftheworkforcewillbecomemoreevidenttoboththegeneralp
Throughoutthetwentiethcentury,from1900onwards,peoplehavedreamtofthetechnologicaladvancesthattheadventofthenew
Dreamsaresaidtobethewindowtothemind.Throughthestudyofdreams,wecancatchglimpsesintowhatoursubconsciousmind
Thedevil,astheoldsayinggoes,isinthedetails.Or,inthecaseofthenewEstonianlawsettingupanationalgeneticdata
TheObamaadministrationwonavictorytodayintheircampaigntostrikedownvoterIDlaws.OnlydaysaftertheUnitedStatesD
Illegalimmigration,whichhassparkedpoliticalandsocialdisorderincommunitiesacrossthenation,isonthewane,according
Customhasnotcommonlybeenregardedasasubjectofanygreatmoment.Theinnerworkingsofourbrainswefeeltobeuniquely
Mothersinterferewiththeirchildren’slivesevenmorethanmostoffspringrealize.Thattheynagabouteatinghabitsiswellk
Niceguysknewit,nowtwostudieshaveconfirmedit:badboysgetthemostgirls.Thefindingmayhelpexplainwhyanastysuit
随机试题
下列不属于暑邪耗气伤津的临床表现是
18F-FDGPET显像在恶性淋巴瘤诊治中的作用,下列叙述不正确的是
下列关于正常人血管内血液不发生凝固的原因的叙述,错误的是
干酪样坏死是()的特征性病变。
A.增强止血化腐的作用B.适宜于眼科及外敷用C.增强散瘀止痛作用D.增强了平肝作用E.增强固涩收敛、明目的作用自然铜煅制的作用是()
关于屋面涂膜防水层施工的说法,正确的有()。
下列不能作为企业资产核算的是()
期货公司的控股股东可直接任免期货公司董事。()
甲、乙、丙、丁、戊5支足球队进行小组单循环赛。比赛规定,每队胜一场得3分,平一场得1分,负一场得O分;积分前两名出线。比赛结束后发现,没有积分相同的球队,乙队胜了3场,另一场负于甲队。根据以上信息,可以得出以下哪项?
8/10
最新回复
(
0
)