牛津高中英语模块5 Unit3 Welcome to the unit

WelcometotheunitTheadvancedtechniqueingenetics(遗传学)withwhichscientistscancreateorcopythingswiththesameDNAiscalled-?cloneScientificdefinitionCloningisthecreationofcellsorwholeanimalsbyusingDNA(脱氧核糖核酸)fromasingleparent,bypassing(绕道而行)thenormalreproductive(生殖)process.TheclonehasthesameDNAtothe“parent”.DollyanditscreatorWhatdoyouknowaboutDolly?theworld’sfirstclonedmammalcreatedbyScottishscientistsin1996diedin2003becauseoflungdiseasemanycountrieshavebannedhumancloningsinceDolly’sbirththeclonedkittenThekitteninthepictureiscalledCc.Itsnameisfrom“Copycat”.ScientistsintheUSAcreateditwithacelltakenfromitsmother,Rainbow.ItwasborninDecember2002.theclonedfemalepigsThefivelittlepigs’namesareNoel,Angel,Star,JoyandMary.thefirstclonedmonkeyThenameoftheclonedmonkeyisANDi.Itisfrom“insertedDNA”speltbackwards.Itisthefirstgeneticallymodifiedmonkey.ThetechnologyisdifferentfromthatusedforDolly.Doyouthinktheclonedanimalsareashealthyasthenaturalones?Dollyis,butscientistsdonotyetknowwhetherthisistheexception(例外)ortherule.Someearlyevidencessuggestthatclonesmayhavehealthproblemsandthattheymayageprematurely(早衰的，未老先衰).Ifyouareascientist,whatdoyouwanttoclone?Why?FunpicturesIfcloninggoeswrong,whatwillhappen?Adogoraneagle?Aduckoracrocodile?Acockoradog?Alionorakangaroo?Afrogoracrocodile?Atortoiseorabear?Abirdoradog?Whatdoyouthinkofthenewkindoftechnology?Doesithaveadvantagesordisadvantages?Doyouthinkgovernmentsshouldpasslawstoprohibithumancloning?Whyorwhynot?Theyshouldn’t,for…reasons:1.Cloningcanhelpcuremanydiseasesandsavealotofpeoplelives.2.……3.……PartATheyshould,for…reasons:1.Cloningcanleadtoethical(伦理)problems.2.……3.……PartBGivinganoralreportTodayourclasshadadiscussionaboutwhetherthegovernmentsshouldpasslawstoprohibithumancloning.Somestudentsthinkthatthegovernmentsshould,for…However,someotherstudentsthinkitnecessarytoprohibit…,for…Inmyopinion,…Thankyouforyourattention!Homework1.Findmoreinformationaboutclone.2.Reviewthenewwords.