高中英语 Unit 2 Cloning reading课件 新人教版选修8.ppt

cloning period2reading step1lead in wordhunt 1 itisanewtechnologywhichmakeane copyofanotheranimalandplant xact thesame precise 2 gardenersuseittomakesomec plants ommercial buyingandsellingofgoods 3 thep ofthistechnologyneedlotsoftime rocedure regularorderorwayofdoingsomething 4 dollythesheepisagreatb in1996 reakthrough importantdevelopmentordiscovery step2 warmingup howmuchdoyouknowaboutcloning rules youwillbeprovidedwith5orquestions eachtimeyougiveawronganswer youhavetositdown whichmeansyouareout x 1 cloningmeansmakingacopyofananimaloraplant 2 gardenerscanmakealotofmoneybycloningplants 3 cloninganimalsisascomplicatedascloningplants x x 4 dollythesheepwasthefirstsuccessfulcloneofamammal5 naturalcloneshappeninanimalsaswillasinplants step3 prediction whatdoyouthinkthearticleisaboutbyreadingthisheadline cloning whereisitleadingus step4 scanning cloninghastwomajoruses cloningisawayofmakinganexactcopyofanotheranimalandplant theeffectofdolly itisforbiddentoclonehumanbeings theproblemsofdolly 1 2 3 4 5 1 whatisthemaintopic a cloning b dollythesheep c itwillleadustosomeplaces 2 whatisthewritingstyle a expositive b descriptive c argumentative develop the illnesses produce cures illnesses step5 carefulreading readthetextcarefullythenfillintheblank die younger produce plants quality for sale leader useful evil plant species moral objections endangered animals new retelling listenandfillintheblanks challengeyourmemory cloninghasalwaysbeenwithusandisheretostay itisawayofmakingan 精确无误 copyofanotheranimalandplant thishappensinplantswhengardenerstakecuttingsfromgro ingplantstomakenewones andwhensmallpartsofaplantaretakenandgrowninalaboratory italsohappensinanimalswhentwins 完全相同的 insexandappearanceareproducedfromthesameoriginalegg thefactisthattheyare 自然的 clonesofeachother para 1 exact identical natural cloninghastwo 主要的 uses firstly gardenersuseitallthetimetoproduce 商业的 quantitiesofplants secondly itisvalua bleforresearchonnewplantspeciesandfor 医学的 researchonanimals cloningplantsis 简单的 butthecloningofanimalsismore 复杂的 theprocedureisdifficulttoundertake ofcourse atfirstitwasnot 精确 enoughandmanyattemptstoclonemammalsfailed para 2 major commercial medical straightforward complicated accurate butatlastthedeterminationandpatienceofthescientistswasrewardedin1996withabreakthrough thecloningofdollythesheep theprocedureworkslikethis 1 雌性的 sheepaprovidesaneggcel2thenucleusisremovedfromtheeggcell 3theeggcellisreadyforanewnucleus para 2 female 4femalesheepbprovidesa 躯体的 cellfortheclone thenucleusofthiscellcontainsallthegenesneededtoproduceanewsheep 5thenucleusistakenoutofthe cell 6thenucleusfromsheepbandtheeggcellfromsheepaarejoinedusingelectricity 7thecelldividesandgrowsintoanembryo 8theembryoisputintofemalesheepc 9thelambisthecloneofthe 捐献的 cellfromsheepbwhichprovidedthenucleus para 2 somatic donated the 整个科学的 worldfollowedtheprogressofthefirst 成功的 clone dollythesheep thefactthatsheseemedtodevelopnormallywasvery 令人鼓的 thencamethe 令人烦扰的 newsthatdollyhadbecomeseriouslyill cloningscientistswere 沮丧的 tofindthatdoll ysillnessweremore 恰当的 toamucholderanimal sadlythesame 任意的 fateaffectedotherspecies para 3 wholescientific successful encouraging disturbing castdown appropriate arbitrary para 3 suchasclonedmice thequestionthatoccurredtothescientistswas wouldthisbeamajordifficultyforallclonedanimals altogetherdollylivedfirsixyears halfthelengthofthelifeofthe 原型的 sheep despiteherproblems dollysuccessfullyproducedalambinanaturalbirth original para 4 ontheotherhand dolly sappearanceraisedastormofobjectionsandhadagreatimpactonthe 媒体和公众的 imagination itbecame有争议的 itsuddenlyopenedeverybody seyestothepossibilityofusingcloningtocureseriousillnesses andevenproducinghumanbeings mediaandpublic controversial para 5 newspaperstoldstoriesofevilleadershopingtoclonethemselvesand 宗教的 leadersraised 道德的 questions governmentsbecame 紧张不安 andmanyforbaderesearchintohumancloning somecountriessuchaschinaandukcontinuedtoaccumulateevidenceofthe 丰富的 medicalaidthatcloningcouldprovide however scientistsstillwonderwhethercloningwillhelporharmusandwhereitisleadingus religious moral nervous abundant step6beautifulsentences itisawayofmakinganexactcopyofanotheranimalandplant thefactisthattheyarenaturalclonesofeachother thencamethedisturbingnewsthatdollyhadbecomeseriouslyill however scientistsstillwonderwhethercloningwillhelporharmusandwhereitisleadingus thedevelopmentofcloninghasmoreadvantagestohumanbeingsorhasmoredisadvantagestohumanbeings step7 extendeddiscussion forum 论坛 topic problemsanimalclonesmaydeveloptheillnessofolderanimals animalclonesmaydieyoungerthanthedonoranimals evilleadersmaywanttoclonethemselves therearemoralobjectionstocloninghumanbeings advantagesmedicalcloningcouldproducecuresforseriousillnessinhumans cloningplantscanproduceplantsofsimilarqualityforsale cl