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1、Module5 Cloning【美文阅读】Thetermcloningdescribesanumberofdifferentprocessesthatcanbeusedtoproducegeneticallyidenticalcopiesofabiologicalentity(实体；实际存在物).Thecopiedmaterial,whichhasthesamegeneticmakeupastheoriginal,isreferredtoasaclone.Researchershaveclonedawiderangeofbiologicalmat
2、erials,includinggenes,_cells,_tissuesandevenentireorganisms,suchasasheep.Overthelast50years,scientistshaveconductedcloningexperimentsinawiderangeofanimalsusingavarietyoftechniques.In1979,researchersproducedthefirstgeneticallyidenticalmicebysplittingmouseembryosinthetesttubean
3、dthenimplantingtheresultingembryosintothewombsofadultfemalemice.Shortlyafterthat,researchersproducedthefirstgeneticallyidenticalcows,sheepandchickensbytransferring(使转移；使调动)thenucleusofacelltakenfromanearlyembryointoaneggthathadbeenemptiedofitsnucleus.Itwasnotuntil1996,however
4、,thatresearcherssucceededincloningthefirstmammalfromamature(somatic)celltakenfromanadultanimal.After276attempts,ScottishresearchersfinallyproducedDolly,thelambfromtheudder(牛、羊等的)乳房)cellofa6yearoldsheep.Twoyearslater,researchersinJapanclonedeightcalvesfromasinglecow,butonlyfou
5、rsurvived.Besidescattleandsheep,othermammalsthathavebeenclonedfromsomaticcellsinclude:cat,deer,dog,horse,mule,ox,rabbitandrat.Inaddition,arhesusmonkeyhasbeenclonedbyembryosplitting.【诱思导学】1．Whatiscloning?________________________________________________________________________2
6、．Whenwasthemammalcloned?________________________________________________________________________【答案】 1.Thetermcloningdescribesanumberofdifferentprocessesthatcanbeusedtoproducegeneticallyidenticalcopiesofabiologicalentity.Thecopiedmaterial,whichhasthesamegeneticmakeupastheorig
7、inal,isreferredtoasaclone. 2.Itwasclonedin1996.PeriodⅠPreviewing(教师用书独具)●教学目标初步掌握本课文中的词汇，浅层次理解课文，了解相关的背景知识。●课标解读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，对下一堂课对课文的全面理解起到一个铺垫作用。●教学地位本模块的主题是“克隆”，阅读课文的第一部分介绍小说《弗兰肯斯坦》的故事梗概，第二部分是小说节选。要求学生掌握相关词汇，培养相关语言技能。了解高科技的迅速发展有可能给人类的
8、未来带来巨大的正面或负面影响；增强科学伦理意识，努力学习文化知识，运用科技发展成果为人类的和平、幸福和发展做贡献。(教师用书独具)●新课
