intervention(干涉)

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1、CloningWhereIsItLeadingUs?Pre-readingLookatthepicturesanddiscusswhichonesarenaturalclonesandwhichonesareman-made.Pictures2,4Anaturalcloneisonethatoccursinnature.Pictures1,3,5Aman-madecloneisonethatisproducedthroughhumanintervention.(干涉)DollythesheepDo

2、llyisaman-madecloneandherbirthprocedureisexplainedinthefirstreading.Sheisanexactcopyofthesheepthatprovidedhergeneticinformation.Herlambwasproducedasanaturalbirth.AstrawberryplantThisisastrawberryplantwhichproducesrunners(长匐茎，纤匐枝)inanaturalformofclonin

3、g.Thenewplantsareexactcopiesoftheoriginalplant.GrowingnewplantsPeoplecutthestemofftheplantandputitintoapottoproduceanewplant.TwinsTheyareidenticalinsexandappearanceandaregoodexamplesofnaturalclones.Twinscarrythesamegenetic(遗传的)information.Identicaldog

4、sThisisthefirstcloneddogintheworld(August3rd,2005)andwasproducedbyalabinSouthKorea.ItiscalledSnuppyandisanAfghanhound(猎犬).TorFquestions:Gardenerscanmakealotofmoneybycloningplants.Cloninganimalsisascomplicatedascloningplants.Dollythesheepwasthefirstsuc

5、cessfulcloneofamammal.Naturalcloneshappeninanimalsaswellasinplants.Mainideas:1.Whatiscloning?/definition2.Twomajorusesofcloninginplantsandanimals.3.ThebirthanddeathofDolly.4.ControversybroughtbyDolly.1.Dollythesheep____.lookedexactlylikethesheepthatpr

6、ovidestheegg.wastheexactcopyofthesheepthatprovidesthenucleus.lookedlikethesheepthatgavebirthtoit.2.WhichofthefollowingisNOTanadvantageofcloning?Cloningcanbeusedformedicalpurpose.Largequantitiesoffoodcanbeproducedbycloning.Cloningcanhelpkeepanimalsfrom

7、becomingextinct.Famouspersonswhohavepassedawaycanbecloned.3.WhathappenedtoDolly?Shedidn’tlivelong.Herillnesseswerealsoappropriatetoothernon-clonedsheepatherage.C.Herdifficultywasbelievedtobethemajordifficultyforallclonedanimals.4.WhichisTRUEaccordingt

8、othetext?Menwilldieoutbecauseawomancangivebirthtoababywithoutahusband.Notallpeopleareinfavorofcloning.Dolly’sappearanceraisedastormineveryfieldexceptthereligiousfield.Discussion:1.whydoyouthinkthereismorecontroversyoveranimalcloningthanoverpla