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1、新課標(biāo)人教版課件系列《高中英語》選修(模塊）8-2.7Unit2CloningwarmingupandspeakingDoyouenjoywatchingTVseries?HaveyoueverseenJourneyToTheWest?Whatisclone?CloneClone,alsocalledreproduceasexually(無性生殖/繁殖),isthecreationofcellsorwholeanimalsusingDNAfromasingle“parent”,withoutusingthenormalreproductive(有性生殖)proce
2、ss.TheclonehasthesameDNAtotheparent.What'sclone?cloneNaturalcloneMan-madecloneNaturalcloneisonethatoccursfromthe“parent”inanaturalformofcloningwithouthumanhelp.Man-madecloneisonethatproducedthroughhumanintervention(介入).cactusstrawberrytwinspendulumorchid(吊蘭)naturalcloningexamplesMan-m
3、adecloningexamplestheimportanteventsincloninghistoryIn5000B.C.(谷物選種)HumanBeingsbegantochoosethebestseedsfromsomekindsofcrops.Thatwasthebeginningofcontrollinglifeaccordingtohuman’swill.In1952:Cloningtadpole(克隆蝌蚪)TheAmericanscientistscreatedacopyoftadpolebymeansofusingatadpolecell.Thist
4、inytadpolehasbecomethefirstkindofcloninganimal.In1978:Thefirstcaseoftubeinfant(試管嬰兒)appeared.☆A(yù)Britishdoctorusedthesperm（精液）ofamanandfertilized(受精)itinatesttube(試管).☆Thentransplanted(移植)theembryo(胚胎)intothewomb(子宮)ofahealthymother.☆ThefirsttubeinfantcalledLouisappeared.In1996,thefamou
5、ssheep“Dolley”wasclonedsuccessfullyDolleyandtheFatherofDolley–Lanwilmut(伊恩.威爾姆)In1998Aseriesofthingswerecloned.ThescientistsinHawaiiUniversityclonedover50mice.Someprivateinstitutions(協(xié)會(huì))successfullyclonedlittleoxen.In2002,thescientistsofA&MUniversityinUSAhasbredthefirstclonedcatinthew
6、orld.Nowadays:☆Cloneddog,mouse,rabbit,goat,ox,pigappeared.☆Chinabecometheseventhcountrythathastheabilitytoclonepigs.☆Chinahassucceededinusingembryonic（胚胎的）celltoclonemanyanimals.TheEndThankyou!QuizNaturalcloneMan-madeclonestrawberry★★Isitnaturalcloneorman-madeclone?identicaldogsNatura
7、lcloneMan-made★cactus★twinsTorFquestions1Clonecanbefrombothnaturalcloneandman-madeclone.2Thesheep,namedKittywasthefirstsuccessfulcloneofamammal(哺乳動(dòng)物).TF3Onlystrawberriesandcactus(仙人掌)arenaturalclones.F4SinceDolley,researcherhaveclonedanumberoflargeandsmallanimalsincludinggoats,cows,mi
8、ce,pi
