英语：Unit2《Cloning》课件(2)(新人教版选修8)

DollythesheepanditsbabyClonedrabbit克隆的荧光小猪(左)和正常小猪(右)克隆马及其“母亲兼姐姐”Inpairsdiscusswhatyouunderstandaboutclothing.Thenlistthequestionsyouwanttofindout.Shareyourlistswithoneanother.Pre-readingQuestionsaboutcloning1.Whatisaclone?Acloneisagroupofcellsororganismsthataregeneticallyidenticalandhavebeenproducedasexuallyfromthesameoriginalcell.Theyincludenaturalandman-madeclones.2.Howisacloneproduced?Thecloningofplantsissimpleandrelativelyeasy.Itcanbedonebytakingcuttings(man-madecloning)orlettingtheplantproduceitsownrunners(naturalcloning).Thecloningofanimalsismorecomplicated.Itwasnotachieveduntil1996andisfullyexplainedinthefirstreading.3.Whatbenefitscanhumansgainfromcloning?1)Medicalcloningcanhelpcureseriousillnessesthatruinone’squalityoflife(suchasParkinson’sdiseaseorAlzheimer’sdisease).2)Itcanhelpinfertilepeoplehavebabies.4.Whatproblemsmayarisewhenhumansarecloned?1)Peoplemaywanttoclonethemselvessotheycanliveforever.2)Peoplemaywanttoclonedeadchildren.3)Peoplemaywanttoclonetheirfavoritepets.ReadingCLONING:WHEREISITLEADINGUS?Reading–IScanningWritetheletter“T”ifthestatementistrue.Write“F”ifitisfalse.1.Cloningmeansmakingacopyofananimaloraplant.2.Gardenerscanmakealotofmoneybycloningplants.3.Cloninganimalsisascomplicatedascloningplants.FFT4.Dollythesheepwasthefirstsuccessfulcloneofamammal5.Naturalcloneshappeninanimalsaswellasinplants.TT1.Themainideaofthetextis____A.animalcloningisveryvaluableandcanbenefittheworld.B.animalcloningcouldbemisusedbybadpeoplesoitmustbeforbidden.C.animalcloningiswelldevelopedbecauseDollythesheepwasborn.D.animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture.Choosetherightansweraccordingtothetext.2.Dollythesheep_____.A.lookedexactlylikethesheepthatprovidestheegg.B.wastheexactcopyofthesheepthatprovidesthenucleus.C.lookedlikethesheepthatgavebirthtoit.D.hadthecharacteristicsofallthreesheep.3.Itcanbeinferredfromthepassagethataclonedanimal_____.A.usuallylivesaslongastheoriginaloneB.usuallyliveslongerthantheoriginaloneC.usuallylivesshorterthantheoriginaloneD.isusuallyashealthyastheoriginalone4.Whichofthefollowingisnotanadvantageofcloning?A.Cloningcanbeusedformedicalpurposes.B.Largequantitiesoffoodcanbeproducedbycloning.C.Cloningcanhelpkeepanimalsfrombecomingextinct.D.Famouspersonswhohavepassedawaycanbecloned.5.Whatispeople’sfearabouthumancloning?Whichofthefollowingiswrong?A.ClonedHitlerswoulddoharmtotheworld.B.Clonedpeoplemaybekilledatwillformedicalaid.C.Awomanwouldhavedifficultyrecognizingherrealhusband.D.Menwilldieoutbecauseawomancangivebirthtoababywithoutahusband.6.ThecloningofDollythesheepsucceededbecause____.A.itseasiertocloneasheepthanotheranimalsB.thescientistsweredeterminedandworkedhardwithpatienceC.thescientistswererewardedandgotlotsofmoneyD.manyotherattemptstoclonemammalsfailed7.Thelambisthecloneofthecellfromsheepbecause_____.A.itprovidestheeggcellB.itgivesbirthtothelambC.itprovidesthenucleusD.itisafemalesheepCarefulreadingReadthetextagainandfindoutthemainideaofeachparagraph.Para.1Para.2Para.3Para.4Para.5Cloningisawayofmakinganexactcopyofanotheranimalandplant.Cloninghastwomajoruses.TheproblemsofDolly.TheeffectofDollyItisforbiddentoclonehumanbeing.Fillinthechartusingtheinformationfromthetext.Addonereasonofyourownineachcolumn.ProblemsordangersofcloningAdvantagesofcloningProblemsordangersofcloningAdvantagesofcloningAnimalclonesmaydeveloptheillnessesofolderanimals.Medicalcloningcouldproducecuresforseriousdegenerative(变质的）illnessesinhumans.Animalclonesmaydieyoungerthanthedonoranimals.Cloningplantscanproduceplantsofsimilarqualityforsale.ProblemsordangersofcloningAdvantagesofcloningEvilleadersmaywanttoclonethemselves.Cloningplantscanbeusefulforresearchonnewplantspecies.Therearemoralobjectionstocloninghumanbeings.Cloningcanhelpsaveendangeredanimals..Whatdoyouthinkisthewriter’spointofviewinthisreadingpassage?Isitinfavourofcloningoragainstit?Ithinkthewriteris_________because______________________________________________________impartialhe/shedoesnotstateanypersonalopinionaboutcloning.Doyouknowabout:Theprocedureworksofasheep?克隆羊诞生图示“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？DiscussionLookatthesepicturesbelowatfirst.Cloningpeopleisagoodthingorabadthing?Whatisyouropinionofcloning?Giveareason.意大利狂人医生:安蒂诺里冒死也要克隆人的科学家:布瓦瑟利耶1.克隆技术现在还不成熟,克隆人可能有很多先天性生理缺陷。2.克隆人的身份难以认定,他们与被克隆者之间的关系无法纳入现有的伦理体系。反对克隆人3.克隆技术有可能被滥用,成为恐怖分子的工具。4.从生物多样性上来说,大量基因结构完全相同的克隆人,可能诱发新型疾病的广泛传播,对人类的生存不利。1.“不让我们克隆人,就是不让我们修正我们的错误,人类历史难道能够这样构造吗？”—《纽约时报书评》2.“当然应该‘克隆’人,如果谁第一个掌握了这个技术,他就是我真正的、也是唯一的竞争对手。”—比尔·盖茨支持克隆人3.“克隆人绝对是科学上了不起的进步,克隆技术必将创造21世纪的辉煌。”—麻省理工学院生命工程教授约翰·布洛克4.“人体商业化是人类经济活动中无与伦比的成就,毫无疑问,克隆技术的出现将为世人创造一个最为广泛和深远的市场。”—英国《经济学家》杂志。