高中英语人教版选修8Unit2 Reading.ppt

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1、CloningUnit2ReadingHadhimcloned?Whatisaclone?Acloneisgroupofcellsororganismsthataregeneticallyidenticalandhavebeenproducedasexually(无性生殖/繁殖)fromthesameoriginalcell.Theyincludenaturalandman-madeclones.clonedMan-madecloneWarmingupTwokindsofclones:isonethatoccursinanaturalformofcloningwithout

2、human’shelp.isonethatisproducedthroughhumanintervention(介入).NaturalcloneAstrawberryplantThenewplantsthatgrowfromtherunnersareexactcopiesoftheoriginalplant.NaturalcloneBanyanNaturalcloneLuckybambooThegardenercutstheplant,andthenthecuttingproducesanothernewplant.Man-madecloneGrowingnewplants

3、Man-madecloneTwinsTheyarebornnaturallyandidenticalinsexandappearance.NaturalcloneMonkeyKingNaturalcloneorman-madeclone?Shewasclonedwhiletheotherswerebornnaturally.HowdoesDollydifferfromothersheep?Man-madecloneIn1996,asheepcalledDollywasborn.Itisthefirstmammaltobecloned.Itisconsideredtobeth

4、egreatestsuccessinthedevelopmentofcloning.Thefollowingaresomephotosaboutcloning.Seehowmuchyouknowaboutit.2001cloningcattle2002cloningcatscloningrabbits2003CloninghorseTheCloningFluorescentpig(left)andthenormalpig(right)2005Cloningdogs2005Cloningwolves2015Cloningcamel2018CloningmonkeyHowwas

5、Dollythesheepborn?Hey,howIwasborn?ReadingCloning:WhereisitLeadingus?eggcell卵细胞nucleus细胞核体细胞somaticcellembryo胚胎FastreadingReadthetextquickly.(3min)Underlineorcirclesomethingyouthinkisimportant.Themainideaofthetextis____A.animalcloningisveryvaluableandcanbenefittheworld.B.animalcloningcouldb

6、emisusedbybadpeoplesoitmustbeforbiddenC.animalcloningiswelldevelopedbecauseDollythesheepwasborn.D.animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture.Mainideaawayofmakinganexactcopyofanotheranimalandplant.1.The_________ofcloning:_______________________________________________

7、____2.The______and_________ofcloning.3.The__________ofDolly(the_________and________ofDolly).4.The____________ofDolly.5.People’s______________tocloning.Themainideaofeachparagraph.problemsusesimpactreaction/attitudesdeathbirthproceduresdefinitionCarefulreadingRe