Q1.Readthepassagegivenbelow.1x5=5 Atthecrimescene,investigatorshavegatheredeverypossibleshredofevidence imaginable:fibresfrom fabrics,hairs,fingermarks,cigaretteends……. Thefewhairs foundonthevictim’sjacketarered.Andtheylookstrangelylikethesuspect’s.Ifitcould …

Q1.Readthepassagegivenbelow.1x5=5 Atthecrimescene,investigatorshavegatheredeverypossibleshredofevidence imaginable:fibresfrom fabrics,hairs,fingermarks,cigaretteends……. Thefewhairs foundonthevictim’sjacketarered.Andtheylookstrangelylikethesuspect’s.Ifitcould beprovedthatthesehairsareindeedhis,thiswouldbeevidencethathehadinfactmet thevictim. Everyindividualisunique Specialistssettowork.Theyexaminesomecellsattherootofthesehairsandsomeof thesuspect’sbloodcells.InthenucleusofeachcellinourbodiesthereisDNA.Whatis it?DNAislikeanecklacemadeoftwotwistedstringsofpearls.Imaginethatthese pearlscomeinfourdifferentcoloursandthatthousandsofcolouredpearls(whichmake upagene)arestrunginaveryspecialorder.Buttheorderofthepearlsvariesfrom one persontoanother.Uniquetoeachindividual,DNAisthusasortofgeneticidentitycard. Geneticistsarethereforeabletocomparethesuspect’sgenes. Justonepieceofevidence Moreandmoreoftenincasesofsexualassault,murder,theftorothercrimes,thepolice arehavinggeneticanalysesdone.Why?Totrytofindevidenceofcontactbetweentwo people,twoobjectsorapersonandanobject.Provingsuchcontactisoftenveryuseful totheinvestigation.Butitdoesnotnecessarilyprovideproofofacrime.Itisjustone pieceofevidenceamongstmanyothers. Onthebasisofyourunderstandingofthegivenpassage,answerthefollowing questionsgivenbelow. 1.ToexplainthestructureofDNA,theauthortalksaboutapearlnecklace.Howdo thesepearlnecklacesvaryfromoneindividualtoanother? A.Theyvaryinlength .B.Theorderofthepearlsisdifferent. C.Thenumberofnecklacesisdifferent.D.Thecolourofthepearlsisdifferent 2.Whatdoyouunderstandby“geneticanalysishastobedone?3.Whatistheauthor’smainaim? A.Towarn. B.Toamuse. C.Toinform. D.Toconvince. 4.TheprofessionofstudyingDNAandgenes? ANeurologist BGeneticist CBiologist DDermatologist 5.Whatistheneedtocollectevidence?

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