牛津高中英语模块5 Unit3 Welcome to the unit课件.ppt

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1、Unit3WelcometotheunitTheadvancedtechniqueingenetics(遗传学)withwhichscientistscancreateorcopythingswiththesameDNAiscalled-?cloneScientificdefinitionCloningisthecreationofcellsorwholeanimalsbyusingDNA(脱氧核糖核酸)fromasingle"parent",bypassing(绕道而行)thenormalreproducti

2、ve(生殖)process.TheclonehasthesameDNAtothe“parent”.DollyanditscreatorWhatdoyouknowaboutDolly?theworld’sfirstclonedmammalcreatedbyScottishscientistsin1996diedin2003becauseoflungdiseasemanycountrieshavebannedhumancloningsinceDolly’sbirththeclonedkittenThekitteni

3、nthepictureiscalledCc.Itsnameisfrom“Copycat”.ScientistsintheUSAcreateditwithacelltakenfromitsmother,Rainbow.ItwasborninDecember2002.theclonedfemalepigsThefivelittlepigs’namesareNoel,Angel,Star,JoyandMary.thefirstclonedmonkeyThenameoftheclonedmonkeyisANDi.Iti

4、sfrom“insertedDNA”speltbackwards.Itisthefirstgeneticallymodifiedmonkey.ThetechnologyisdifferentfromthatusedforDolly.Doyouthinktheclonedanimalsareashealthyasthenaturalones?Dollyis,butscientistsdonotyetknowwhetherthisistheexception(例外)ortherule.Someearlyeviden

5、cessuggestthatclonesmayhavehealthproblemsandthattheymayageprematurely(早衰的，未老先衰).Ifyouareascientist,whatdoyouwanttoclone?Why?BrainstormingFunpicturesIfcloninggoeswrong,whatwillhappen?Adogoraneagle?Aduckoracrocodile?Acockoradog?Alionorakangaroo?Afrogoracrocodi

6、le?Atortoiseorabear?Abirdoradog?Whatdoyouthinkofthenewkindoftechnology?Doesithaveadvantagesordisadvantages?DiscussionDoyouthinkgovernmentsshouldpasslawstoprohibithumancloning?Whyorwhynot?Theyshouldn’t,for…reasons:Cloningcanhelpcuremanydiseasesandsavealotofpe

7、oplelives.2.……3.……PartATheyshould,for…reasons:Cloningcanleadtoethical(伦理)problems.2.……3.……PartBGivinganoralreportTodayourclasshadadiscussionaboutwhetherthegovernmentsshouldpasslawstoprohibithumancloning.Somestudentsthinkthatthegovernmentsshould,for…However,s

8、omeotherstudentsthinkitnecessarytoprohibit…,for…Inmyopinion,…Thankyouforyourattention!HomeworkFindmoreinformationaboutclone.2.Reviewthenewwords.Thankyou！