人教版高二年级英语选修8 unit3Warming up课件.ppt

Unit2cloning,Warmingup,Thesetwolovelygirlsare_.,A.twinsB.cloned,A,Clone?,Naturalclone,Man-madeclone,Naturalcloneisonethatoccursfromthe“parent”inanaturalformofcloningwithouthumanhelp.,Man-madecloneisoneproducedthroughhumanintervention(介入).,naturalclones,naturalclones,man-madeclones,clonedanimals,Dollyanditscreator,第一只克隆宠物猫,clonedrabbit,克隆的荧光小猪(左)和正常小猪(右),克隆马及其“母亲兼姐姐”,Theworldsfirstclonedmule(驴),wasbornonMay4.Heiscreatedfromacellofhisbrother.,Theworldsfirstclonedcat,kitten,namedCc.Itwascreatedusingacelltakenfromanadultcat,Rainbow.,Inpairs,lookatthesepicturesanddiscusswhichonesarenaturalclonesandwhichonesareman-made.Thinkabouthowtheydiffer.,Itsthemostfamoussheepintheworld.DoyouknowhowDollyisdifferentfromothersheep?,Shewasclonedwhiletheotherswerebornnaturally.Itisthecopyofanothersheep.,2.Whatcanyouseeinthesecondpicture?,Astrawberryplantproducingrunnersinanaturalformofcloning.,3.Whocutoffthestemoftheplant?,Agardener.Andthegardenerisgoingtoputitintoapottoproduceanotherplant.,4.Whatdoyouknowabouttwins?,Therearetwinsofthesamesexandthoseofdifferentsexes.Thetwinshereareidenticalinsexandappearanceandaregoodexamplesofnaturalclones.Theycarrythesamegeneticinformation.,Arethefollowingclonesthesame?Ifnot,whatisthedifference?,NO.Dollyisanexampleofman-madeclone.Thetwinsarenaturalclones.,Theadvancedtechniqueingenetics(遗传学)withwhichscientistscancreateorcopythingswiththesameDNA.,Whatisaclone?,Discussion,ScientificDefinition,CloningisthecreationofcellsorwholeanimalsbyusingDNAfromasingle“parent”,notwiththenormalreproductiveprocess.TheclonehasthesameDNAtothe“parent”.,Howisacloneproduced?,Problemsordangersofcloning,Animalclonesmaydeveloptheillnessesofolderanimals.,Animalclonesmaydieyoungerthanthedonoranimals.,Evilleadersmaywanttoclonethemselves.,Therearemoralobjectionstocloninghumanbeings.,Advantagesofcloning,Medicalcloningcouldproducecuresforseriousillnessesinhumans.,Cloningplantscanproduceplantsofsimilarqualityforsale.,Cloningplantscanbeusefulforresearchonnewplantspecies.,Cloningcanhelpsaveendangeredanimals.,TrueorFalse,Cloningmeansmakingacopyofananimaloraplant.2.Gardenerscanmakealotofmoneybycloningplants.3.Cloninganimalsisascomplicatedascloningplants.4.Dollythesheepwasthefirstsuccessfulcloneofamammal.5.Naturalcloneshappeninanimalsaswellasinplants.,F,F,T,T,T,Oh!MyGod!Iwascloned!,Isitgoodcloningpeople?,1.differvi.Inpairs,lookatthesepicturesanddiscusswhichonesarenaturalclonesandwhichonesareman-made.Explainhowtheydiffer.两人一组,观察图片并讨论哪些是自然无性繁殖,哪些是人工的。解释它们的区别。differ(vi.),主要有两个义项:“不同,相异；不同意,意见相左”。常见的搭配有:,NewWords,1)sb.differfrom/withsb.on/upon/aboutsth.:某人与某人在.方面意见不同2)sth.andsth.differin:某物与某物在.方面不同3)sth.differfromsth.:某物与某物不同differencen.不同differentadj.不同的ChinesediffersgreatlyfromEnglishinpronunciation.汉语与英语在发音上有很大的不同。,Modernairplanesdifferfromearlyones.现代飞机跟早期的在很多方面有所不同。Idifferwithhimhowtosolvetheproblem.对于如何解决问题,我跟他的意见不一致。,Theydifferwitheachotheronmoralstandards.关于道德标准,他们的见解不同。Theboydiffersfromhismotherincharacter.这个小男孩在性格方面不同于他的母亲。,1)Wediffer_him_thatquestion.2)Thetwonationsdiffer_cultureandreligion.3)Theclimate