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1、Publishedin2012byBritannicaEducationalPublishing(atrademarkofEncyclopædiaBritannica,Inc.)inassociationwithRosenEducationalServices,LLC29East21stStreet,NewYork,NY10010.Copyright©2012EncyclopædiaBritannica,Inc.Britannica,EncyclopædiaBritannica,andtheThistl
2、elogoareregisteredtrademarksofEncyclopædiaBritannica,Inc.Allrightsreserved.RosenEducationalServicesmaterialscopyright©2012RosenEducationalServices,LLC.Allrightsreserved.DistributedexclusivelybyRosenEducationalServices.ForalistingofadditionalBritannicaEdu
3、cationalPublishingtitles,calltollfree(800)237-9932.FirstEditionBritannicaEducationalPublishingMichaelI.Levy:ExecutiveEditor,EncyclopædiaBritannicaJ.E.Luebering:Director,CoreReferenceGroup,EncyclopædiaBritannicaAdamAugustyn:AssistantManager,EncyclopædiaBr
4、itannicaAnthonyL.Green:Editor,Compton’sbyBritannicaMichaelAnderson:SeniorEditor,Compton’sbyBritannicaShermanHollar:AssociateEditor,Compton’sbyBritannicaMarilynL.Barton:SeniorCoordinator,ProductionControlStevenBosco:Director,EditorialTechnologiesLisaS.Bra
5、ucher:SeniorProducerandDataEditorYvetteCharboneau:SeniorCopyEditorKathyNakamura:Manager,MediaAcquisitionRosenEducationalServicesHeatherM.MooreNiver:EditorNelsonSá:ArtDirectorCindyReiman:PhotographyManagerKarenHuang:PhotoResearcherMatthewCauli:Designer,Co
6、verDesignIntroductionbyHeatherM.MooreNiverLibraryofCongressCataloging-in-PublicationDataAcloserlookatgenesandgeneticengineering/editedbyMichaelAnderson.p.cm.—(Introductiontobiology)“InassociationwithBritannicaEducationalPublishing,RosenEducationalService
7、s.”Includesbibliographicalreferencesandindex.ISBN978-1-61530-576-6(eBook)1.Genes—Juvenileliterature.2.Geneticengineering—Juvenileliterature.I.Anderson,Michael(MichaelJ.),1972-QH447.C562012572.8'6—dc222011007581Onthecover:Achromosomeisamicroscopic,threadl
8、ikepartofthecellthatcarrieshereditaryinfor-mationintheformofgenes.Shutterstock.comOnthecover(background),backcover,page3:DNAstrands.AdrianNeal/Lifesize/GettyImagesPages12,32,44,54,63,77,78,81,84,85©www.istockphoto.com/uzin
