Unit 3 Science versus nature 课件 18

《Unit 3 Science versus nature 课件 18》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Unit3ScienceandnatureTheadvancedtechniqueingenetics(遗传学)withwhichscientistscancreateorcopythingswiththesameDNA.Whatisclone?ScientificdefinitionCloningisthecreationofcellsorwholeanimalsbyusingDNAfromasingle“parent”,notwiththenormalreproductive(生殖)process.TheclonehasthesameDNAtothe“parent”.Clonedan

2、imalsDollyanditscreatorWhatdoyouknowaboutDolly?theworld’sfirstclonedmammalcreatedbyScottishscientistsin1996diedin2003becauseoflungdiseasemanycountrieshavebannedhumancloningsinceDolly’sbirthTheworld’sfirstclonedpigswereproducedfromanadultfemalepigusingadifferenttechniquefromtheonethatproducedDolly

3、.Theworld’sfirstclonedcat,kitten,namedCc.Itwascreatedusingacelltakenfromanadultcat,Rainbow.Thefirstclonedmonkeyisanotherincrementalsteptowarddesigningandperfectingnewtreatmentsforhumangeneticdisorders.theclonedmousethecloneddeerIn1962,thescientistGurdonfromCambridgeclonedatadpoleIn1963,Chinesesci

4、entistTongDizhouclonedacarp,whichwas33yearsearlierthanDolly.theclonedhorseBornin2005inSeoulUniversityinKoreaSnoopyBrainstormingIfyouareascientist,whatdoyouwanttoclone?Why?Doyouthinktheclonedanimalsareashealthyasthenaturalones?Dollyis,butscientistsdonotyetknowwhetherthisistheexception(例外)ortherule

5、.Someearlyevidencessuggestthatclonesmayhavehealthproblemsandthattheymaydieprematurely.JustimagineSupposingyouarefacingyoursecondselfwholookslikeyou,talkslikeyouandthinkslikeyou,howdoyoufeel?Oneman,oneworld?FunnypicturesIfcloninggoesinawrongdirection,whatwillhappen?Adogoraneagle?Aduckoracrocodile?

6、Acockoradog?Alionorakangaroo?Afrogoracrocodile?Atortoiseorabear?Abirdoradog?Adogoraman?Whoisthis?克隆如何才能和谐？Doyouthinkitwouldbeagoodideatoclonehumanssomeday?Whyorwhynot?Itisagoodidea,for…reasons:Cloningcanhelpcuremanydiseasesandsavealotofpeople’slives.2.…3.…PartyAItisabadidea,for…reasons:Cloningcan

7、leadtoethical(伦理)problems.2.…3.…PartyBHomeworkWriteashortpassageaboutwhetheritisagoodideatoclonehumans.Todayourclasshadadiscussionaboutwhetheritisagoodideatoclonehumans.Somestudentsthinkthatitisgood,for…However,someoth