人教版高中英语选修8Unit2Cloning教案

1、文档来源为 :从网络收集整理.word 版本可编辑.欢迎下载支持Unit2Cloning【美文阅读】Pandascanbesavedbycloning?从1998年中国科学院动物研究所首席科学家、动物克隆与受精生物学学科带头人陈大元首次正式提出克隆大熊猫到现在，整整16年过去了，陈老仍然执著于此。然而保护大熊猫，究竟要不要通过克隆的方式呢？Chinahasbeenexploringeverypossiblemeansofsavinggiantpandas，oneoftheworldsmostendangeredspecies，frombecomingextinct，evenifitmeansresortingto（诉诸）cloningthem.ChenDayuan，aseniorscientistwhospecializesincloningattheInstituteofZoologyintheChineseAcademyofSciences，introducedtheideaofperformingcloningtechniquesongiantpandasin1998.Using

2、initialfundingof100,000yuan，Chensuccessfullyproducedblastocysts（胚泡）bytransplantingthesomaticnucleusfromsamplepandasintotheeggcellsofrabbits.Themovewasconsideredasoneofthe10biggestachievementsofscienceandtechnologyin1999.Itwonanawardof6millionyuanandfurtherfundingof5millionyuanfortheprojectfromtheMinistryofScienceandTechnology.Atfirst，twoembryoswerecreatedfromasurrogatemother（代母）catwhobecamepregnantafterbeinginjectedwithablastocyst，buttheexperimentwasabandonedafterthecatdied.Chenandhisteamthenexp

3、erimentedwithsurrogacyonblackbears.Afterthreeyearsofeffort，ablackbearbecamepregnantandtheshapeofafetus（胎儿）couldbeseenonanultrasoundscan（超声波扫描检查）However，theresearchwasstoppedin2005becausethefetusdidnotcompletelydevelopbeforetheprojectsdeadline.“Thosewhoareagainstcloninghavemadetheirvoicesheardthroughouttheresearchprojectoncloninggiantpandas.Somepeoplebelievecloninggoesagainstnature，butitisactuallyapioneeringtechnology.Ifsuccessful，itisawaytosaveendangeredanimals，”Chensaid.Somescientiststakeadiffe

4、rentview.“WhileIagreethatresearchoncloningismeaningful，itisinappropriatetousegiantpandasinthistypeofexperiment.Thenumberofpandasislimitedandhumanbeingshaveyettomasterknowledgeaboutsaid Wang Dajun ，pandaspregnancy.CloningwoulddolittletosavethespeciesPeking University.aresearcherattheSchoolofLifeSciences文档来源为：从网络收集整理.word版本可编辑.欢迎下载支持.Inresponse,Chensaidthathewouldcontinuehisresearch.【诱思导学】1. Doyouthinkpandascanbesavedbycloning?Why?【答案】省略2. Whyaresomescientistsagainstcloningpandas?【答案】Becausetheyth

5、inkcloninggoagainstnature.PeriodIPreviewing（教师用书独具）教学目标本课时主要是通过学生对学案所给出的内容的学习，了解本课文中所出现的词汇，初步了解课文以及相关的背景知识，为下一堂课对课文的全面理解起到一个铺垫作用。教学地位本单元的中心话题是“克隆”。克隆意为无性繁殖，克隆技术即是无性繁殖技术。1997年英国罗斯林研究所试验成功的克隆羊多莉是首次利用体细胞克隆成功的，它在生物工程史上揭开了新的一页。本单元内容具体涉及“什么是克隆”、“克隆羊多莉是如何诞生的”、“克隆的利弊”等。语言技能和语言知识都是围绕“克隆”这一中心话题设计的。目的在于让他们了解有关克隆的知识和科普文章的一些基本特征和写作方法，自己尝试写简单的辩论报告。敖挈方案设汁挂方咚流程细解用“敷素”,（教师用书独具）新课导入建议可以通过让学生看和讨论教材Pio的热身（WarmingUp）的图片：克隆羊多莉、人类的双胞胎、草莓的自然无性繁殖以及插枝繁殖的植物等导入新课。要求学生分组讨论，了解两种不同的克隆：自然克隆和人工克隆。为下面的阅读做好铺垫。老师要尽量给学生自主学习的时间和空间，通

6、过自学、自做、自悟、自助等方式，让学生更好地体会和理解文章的内容。教学流程设计导入新课。？学生阅读“美文阅读”与“诱思导学”（见学案第19页）。？学生就“话题美文导读”进行讨论，统一答案。？学生再次阅读课文（课本第1112页）并完成“语篇理解”（见学案第20页）。？师生共同讨论并统一答案。？让学生快速阅读课文，（见课本第1112页）并完成“篇章结构”（见学案第20页）。?学生共同讨论，并让学生发表各自见解，最后统一答案。？学生再次仔细阅读课文，（课本第1112页）进行深度理解，并完成“课文缩写”（见学案第20页）。?老师指导学生讨论，共同找出答案。?让学生根据所给出的表格进行自我评估（见学案第21页）。？学生讨论，并让学生代表发表他们讨论得出的答案。老师予以更正。？让学生完成“知识初探”部分（见学案第21页）。?老师布置作业，让学生看课本并完成课本第12页1、2、3题，预习学案Periodn（见学案第21页），写一篇简单的辩论报告类作文。I.篇章结构阅读P11-12的Reading部分，然后完成下列表格Cloning:Whereisitleadingus?ParagraphMainid

7、eaContents1Thedefinition（定义）ofcloningCloningisawayofmakingan1.anotheranimalorplant.Ithappensbothinplantsandanimals.2Themajor2.ofcloningFirstly,gardenersuseittoproducecommercial3.Secondly,itisvaluableforresearchonnewplantspeciesandformedicalresearchonanimals.3TheproblemsofDollyAtfirstsheseemedtodevelopnormally.Thencame4. thatshehadbecomeseriouslyill,which5. cloningscientists.Dollylivedonlysixandahalfyears,6.thelifeoftheoriginalsheep.Cloningscientistswonderednowtoovercometheproblems.4TheeffectofDo

8、llyItsappearanceraisedastormof7.andhadagreatimpactonmediaandpublicimagination.Italsooccuredtopeoplethattheycancureseriousillnessesandeventoproduce8.usingcloning.5PeoplesGovernmentbecame9.Somebegantoreactiontocloning10.researchintohumancloning.Scientistsstillwonderwhethercloningwillhelporharmusandwhereitisleadingus.【答案】l.exactcopyof2.uses3.quantitiesofplants4.thedisturbingnews5.castdown6.halfthelengthof7.objections8.humanbeings9.nervousandmoreconservative10.forbidn.语篇理解阅读Ph12的Reading部分，选择最佳答案1. W

9、hatarepeoplecloningnow?A. Theyarecloningbooksandmachines.B. Theyarecloninghumansandanimals.C. Theyarecloningtrees,crops,grass,flowers,etc.,aswellasanimals.2. Itcanbeinferredfromthepassagethataclonedanimal.A. usuallylivesaslongastheoriginaloneB. usuallyliveslongerthantheoriginaloneC. usuallylivesshorterthantheoriginalone3. ThecloningofDollythesheepsucceededbecause.A. itiseasiertocloneasheepthanotheranimalsB. thescientistsweredeterminedandworkedhardwithpatienceC. itismoreusefulthanplants4. Fromthepassage,wecansee.A. Dollysoriginalsheeplived13yearsB. DollysbabywasalsoaclonedoneC. newspapersdidnotdisclosecloningsheep5. Wecanusetheskillofcloningto.A. bringaboutglobalpeaceB. createotherfamousscientistsC. curesomespecial

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