cloningUnit2cloningUnit21Learningaims:*Tohaveagoodunderstandingofthereadingpassage;*Tobeabletodiscusssomeoftheissuesassociatedwithcloning.Learningaims:2DollythesheepDolly

wascloned

whiletheotherswereborn

naturally.HowdoesDollydifferfromothersheep?man-madecloneDollythesheepDollywasclone3Naturalclone

isonethatoccurs

inanaturalformofcloning

withouthumanhelp.Man-madeclone

isonethatisproducedthroughhumanintervention(介入).Naturalcloneisonethatoccu4Lookatthefollowingpicturesanddiscusswhichonesarenaturalclonesandwhichonesareman-madeclones.DiscussionLookatthefollowingpictures5Naturalorman-madeclones?Naturalorman-madeclones?6

一株草莓依靠它沿地“爬走”的匍匐莖,一年內就能長出數(shù)百株草莓苗。NaturalcloneAstrawberryplant一株草莓依靠它沿地“爬走”的匍匐莖,一年內就能長出數(shù)7Growingnewplantsman-madecloneGrowingnewplantsman-madeclo8NaturalcloneTwinsNaturalcloneTwins9Doyouwanttoknow:Whatisaclone?Howisacloneisproduced?Whatbenefitscanhumangainfromcloning?Whatproblemsmayarisewhenhumansarecloned?Doyouwanttoknow:10

Reading:cloning:whereisitleadingus?Reading:cloning:whereisitl111.Scanthefollowingpassageandmatchtheparagraphwiththecorrectsentence.Para1A.TheproblemsofDollyPara2B.ThetwomajorusesandproceduresofcloningPara3C.TheimpactofcloningDollyPara4D.ThedefinitionofcloningPara5E.People’sreactiontocloningFast-reading(5minutes)1.Scanthefollowingpassage122.Themainideaofthetextis______.

A.Animalcloningisveryvaluableandcanbenefittheworld.B.Animalcloningcouldbemisusedbybadpeoplesoitmustbeforbidden.C.AnimalcloningiswelldevelopedbecauseDollythesheepwasborn.D.Animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture.Fast-reading2.Themainideaofthetexti13Careful-readingTask1:（para1-2)(3minutes)1.Whatiscloning?

2.Whatarethetwomajorusesofcloning?

3.Whyisiteasiertomakecommercialplantclonesthananimalclones?Careful-readingTask1:（para1-214Careful-readingTask1:（para1-2)Whatiscloning?

Cloningisawayofmakinganexactcopyof

anotheranimalorplant.

Careful-readingTask1:（para1-215Careful-readingTask1:（para1-2)2.Whatarethetwomajorusesofcloning?

Thefirstuseistoproducecommercialquantitiesofplants.

Thesecondistoresearchonnewplantsspeciesanddomedicalresearchonanimals.Careful-readingTask1:（para1-216Careful-readingTask1:（para1-2)3.Whyisiteasiertomakecommercialplantclonesthananimalclones?

Becausecloningplantsisstraightforwardwhilecloninganimalsisverycomplicated.Careful-readingTask1:（para1-217Careful-readingTask2:（para3-5)(4minutes)1.Itcanbeinferredfromthepassagethataclonedanimal_____.usuallylivesaslongastheoriginaloneB.usuallyliveslongerthantheoriginaloneC.usuallylivesshorterthantheoriginaloneD.isusuallyashealthyastheoriginalone推理判斷題Careful-readingTask2:（para3-5182.Whichofthefollowingisnotanadvantageofcloning?Cloningcanbeusedformedicalpurposes.Largequantitiesoffoodcanbeproducedbycloning.Cloningcanhelpkeepanimalsfrombecomingextinct.Famouspersonswhohavepassedawaycanbecloned.2.Whichofthefollowingisn193.What’sthewriter’sattitudetowardscloning?A.SupportiveB.NeutralC.NegativeD.Subjective中立的objective客觀的，公正的3.What’sthewriter’sattitud20Detailed-readingTask1:Groupwork1(3minutes)DiscussingroupsandthenshowustheprocedureofthecloningofDollythesheep.克隆羊多莉的產(chǎn)生過程（動畫）.swfDetailed-reading克隆羊多莉的產(chǎn)生過程（動畫）21TheprocedureofcloningDollythesheep:

First,

femalesheepAprovides_________,whosenucleusisremoved.FemalesheepBprovidesa_______cell,whosenucleuscontainsallthegenesneededtoproduceanewsheep.Then

thenucleusfromsheepBandtheeggcellfromsheepAarejoinedusing____________.Thecelldividesandgrowsintoan_______,whichisputintofemalesheepC.Soshebecomesthecarrieroftheclone.Finally,anewlamb,whichisthecloneofsheepB,isproduced.aneggcellsomaticelectricityembryoTheprocedureofcloningDolly22Detailed-reading

Task2:

Fillinthechartusingtheinformationfromthereadingpassage.(4minutes)ProblemsordangersofcloningAdvantagesofcloning1.Animalclonesmaydevelopthe_______ofolderanimals.1.Medicalcloningcouldbeusedto_____seriousillnessesinhumans.2.Animalclonesmaydie_______thanthedonoranimals.2.Gardenerscanusecloningtoproduce____________qualitiesplants.3._____leadersmaywanttoclonethemselves.3.Cloningisvaluableforresearchon___________________.4.Thereare________questionsofcloninghumanbeings.4.Cloningisvaluablefor___________________onanimals.Detailed-reading

Task2:Fill23Answers:ProblemsordangersofcloningAdvantagesofcloning1.Animalclonesmaydevelopthe_______ofolderanimals.2.Animalclonesmaydie_______thanthedonoranimals.1.Medicalcloningcouldbeusedto_____seriousillnessesinhumans.2.Gardenerscanusecloningtoproduce____________qualitiesplants.illnesses

cureyoungercommercialAnswers:Problemsordangersof24Answers:ProblemsordangersofcloningAdvantagesofcloning3._____leadersmaywanttoclonethemselves.4.Thereare________questionsofcloninghumanbeings.3.Cloningisvaluableforresearchon___________________.4.Cloningisvaluablefor_________________onanimals.EvilnewplantspeciesmoralmedicalresearchAnswers:Problemsordangersof25Challengeyourself:(3minutes)閱讀下面材料，在空白處填入適當?shù)膬热荩ú欢嘤?個詞）或括號內單詞的正確形式。

Cloningisawayofmaking______exactcopyofanotheranimalorplant.Cloningplantsisstraight-forward_________cloninganimalsiscomplicated.Cloninganimalsisadifficulttask_______________(undertake).Butatlastthedeterminationandpatienceofscientists___________(payoff)in1996withabreakthrough——thecloningofDollythesheep.Thefact_______Dollyseemedtodevelopnormallywasveryencouraging.Thencamethedisturbingnewsthatshehadbecomeseriouslyill.Cloningscientists______________(castdown)tofindthatDolly’sillnessesanwhiletoundertakepaidoffthatwerecastdownChallengeyourself:(3minutes)26Challengeyourself:weremoreappropriatetoamuch________(old)animal.AltogetherDollylivedsixandahalfyears.Dolly’sappearanceraisedastormof___________(object)andhadagreatimpact_______themediaandpublicimagination.Itbecamecontroversial.Somegovernmentsbegantoreformtheirlegalsystemsandforbaderesearchintohumancloning,butothercountriescontinuedtoaccumulateevidenceoftheabundantmedicalaid_________