公开课 Unit2 Cloning

ReadingInpairs,lookatthesepicturesanddiscusswhichonesarenaturalclonesandwhichonesareman-made.Explainhowtheydiffer.Discussion一株草莓依靠它沿地“爬走”的匍匐茎,一年内就能长出数百株草莓苗TwinsTheyarebornnaturallyandidenticalinsexandappearance.Dolly是世界上第一例用体细胞─乳腺上皮细胞,通过细胞核移植技术,在复杂的人工操作下,得到的一只小绵羊。Whatisaclone?Howisacloneproduced?ReadingPleaseListentothetapeandgetthemainidea,andthenfinishthefollowingexercisesingroups.1.Themainideaofthetextis____A.animalcloningisveryvaluableandcanbenefittheworld.B.animalcloningcouldbemisusedbybadpeoplesoitmustbeforbiddenC.animalcloningiswelldevelopedbecauseDollythesheepwasborn.D.animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture.主旨大意2.WhichofthefollowingstatementsaboutcloningisNOTtrueaccordingtotext?__A.Cloningissomethingthathasbeendevelopedquiterecently.B.Twinsthatlookexactlythesameareoriginallyfromthesameegg.C.Cloningisusedbygardenerstomakemoremoney.D.Animalcloningismuchmoredifficultthanplantcloning.细枝末节A3.ThecloningofDollythesheepsucceededbecause____.A.itseasiertocloneasheepthanotheranimalsB.thescientistsweredeterminedandworkedhardwithpatienceC.thescientistswererewardedandgotlotsofmoneyD.manyotherattemptstoclonemammalsfailedB4.Thesheepthatdonatedthesomaticcellmostprobablylived____years.A.3B.6C.9D.12推理判断5.DollythesheepA.lookedexactlylikethesheepthatprovidestheeggB.wastheexactcopyofthesheepthatprovidesthenucleusC.lookedlikethesheepthatgavebirthtoitD.hadthecharacteristicsofallthreesheep6.Whataboutthewriter’sattitudetowardcloninginthispassage?A.Objective(befair)B.Negative(beagainstit)C.Positive(beinfavorofit)theauthordoesnotstateanypersonalopinionaboutcloning.Because_________________________________________________________________观点态度MainideasReadthepassageandfindoutthemainideaofeachparagraph.Para.1ThedefinitionofcloningPara.2ThemajorusesandproceduresofcloningPara.3TheproblemsofDollyPara.4TheeffectofDollyPara.5People’sreactiontocloning“多利”的诞生标志着克隆研究取得新的进展和重大突破,而且这个结果证明:动物体中执行特殊功能,具有特定形态的所谓高度分化的细胞与受精卵一样具有发育成完整个体的潜在能力。也就是说,动物细胞与植物细胞一样,也具有全能性.“多利”的诞生有什么重大的意义和影响？1996cloningsheeps2001cloningcattle2002年4月16日美国第一头克隆牛“艾米”产下牛犊喜作妈咪我国成功繁殖克隆兔体形要比普通兔大许多2002年5月中旬成功地繁殖了一只胚胎细胞克隆兔。2002cloningcats第一只克隆宠物猫克隆马及其“母亲兼姐姐”2005cloningdogs克隆的荧光小猪(左)和正常小猪(右)ThinkingLookatthesepictures,andthinkaboutthisquestion.Iscloningpeopleagoodthingorabadthing?