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1、Unit2cloningWarmingup&ReadingTwinsTheyarebornnaturallyandidenticalinsexandappearance.AstrawberryplantThenewplantsthatgrowfromtherunnersareexactcopiesoftheoriginalplant.一株草莓依靠它沿地“爬走”的匍匐莖,一年內(nèi)就能長出數(shù)百株草莓苗。富貴竹插枝即活Thegardenercuttheplant,thenthecuttingsproduceanothernewplan
2、t.1996cloningsheepsShewasclonedwhiletheotherswerebornnaturally.Itistheexactcopyofanothersheepandthefirstclonedmammal.Dollythesheep沒爹沒娘的多莉羊2001cloningcattle我國成功繁殖克隆兔 體形要比普通兔大許多2002年5月中旬成功地繁殖了一只胚胎細胞克隆兔。2002cloningcats2002年4月十六日美國第一頭克隆牛“艾米”產(chǎn)下牛犢喜作媽咪。2005cloningdogsCloni
3、ngisawayofmakinganexact_____ofanotheranimalorplant.Whatiscloning?copyWhatisthedifferenceamongthem?NaturalcloneMan-madeclonecloneArethefollowingclonesthesame?man-madeclonesnaturalclonesClone?NaturalcloneMan-madecloneNaturalcloneisonethatoccursfromthe“parent”inanatura
4、lformofcloningwithouthumanhelp.Man-madecloneisoneproducedthroughhumanintervention(介入).Oh!MyGod!Iwascloned!Isitgoodcloningpeople?Inpairsdiscusswhatyouunderstandaboutcloning.Thenlistthequestionsyouwanttofindout.Shareyourlistswithoneanother.Pre-reading1.Whatisaclone?Ac
5、loneisananimaloraplantproducednaturallyorartificiallyfromthecellsofanotheranimalorplantandisexactlythesameasit.2.Howisacloneproduced？Thecloningofplantsissimpleandrelativelyeasy.Itcanbedonebytakingcuttings(man-madecloning)orlettingtheplantsproduceitsownrunners(natura
6、lcloning).Thecloningofanimalsismorecomplicated.Itwasnotachieveduntil1996andisfullyexplainedinthefirstreading.3.Whatbenefitscanhumansgainfromcloning？Medicalcloningcanhelpcureseriousillnessesthatruinone’squalityoflife(suchasParkinson’sdiseaseorAlzheimer’sdisease).Itca
7、nhelpinfertilepeoplehavebabies.4.Whatproblemsmayarisewhenhumansarecloned?Peoplemaywanttoclonethemselvessotheycanliveforever.Peoplemaywanttoclonedeadchildren.Peoplemaywanttoclonetheirfavouritepets.PredictionWhatdoyouthinkthearticleisaboutbyreadingthisheadline?CLONING
8、:WHEREISITLEADINGUS?Whatisthemainideaofthepassage?Thepassagetellsusthatanimalcloningraised__________andscientistsarenotsureaboutits______.
