高中英语Book8 Unit2 Cloning Warmingup and Reading课件人教版选修八.ppt

unit2cloning inpairs lookatthesepicturesanddiscusswhichonesarenaturalclonesandwhichonesareman made explainhowtheydiffer dollythesheep astrawberryplant growingnewplants twins identicaldog clone 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 富贵竹插枝即活 仙人掌每块落地就生根 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 多利 2002年4月十六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 第一只克隆宠物猫 克隆马及其 母亲兼姐姐 克隆的荧光小猪 左 和正常小猪 右 what sclone clone naturalclone man madeclone naturalcloneisonethatoccursfromthe parent inanaturalformofcloningwithouthumanhelp man madecloneisonethatproducedthroughhumanintervention 介入 cactus pendulumorchid 吊兰 naturalcloningexamples strawberry twins naturalcloningexamples man madecloningexamples theimportanteventsincloninghistory in5000b c 谷物选种 humanbeingsbegantochoosethebestseedsfromsomekindsofcrops thatwasthebeginningofcontrollinglifeaccordingtohuman swill in1952 cloningtadpole 克隆蝌蚪 theamericanscientistscreatedacopyoftadpolebymeansofusingatadpolecell thistinytadpolehasbecomethefirstkindofcloninganimal torfquestions1clonecanbefrombothnaturalcloneandman madeclone 2thesheep namedkittywasthefirstsuccessfulcloneofamammal 哺乳动物 t f 3onlystrawberriesandcactus 仙人掌 arenaturalclones f 4sincedolly researcherhaveclonedanumberoflargeandsmallanimalsincludinggoats cows mice pigs cats rabbitsanddogs 5aparentcancloneachildwhoisdyingofaterminalillness 不治之症 t f questionsaboutcloning 1 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 1 themainideaofthetextis a animalcloningisveryvaluableandcanbenefittheworld b animalcloningcouldbemisusedbybadpeoplesoitmustbeforbidden c animalcloningiswelldevelopedbecausedollythesheepwasborn d animalcloningraisedargumentsandscientistsarenotsureaboutitsfuture choosetherightansweraccordingtothetext 2 dollythesheep lookedexactlylikethesheepthatprovidestheegg wastheexactcopyofthesheepthatprovidesthenucleus c lookedlikethesheepthatgavebirthtoit d hadthecharacteristicsofallthreesheep 3 itcanbeinferredfromthepassagethataclonedanimal a usuallylivesaslongastheoriginaloneb usuallyliveslongerthantheoriginalonec usuallylivesshorterthantheoriginaloned isusuallyashealthyastheoriginalone 4 whichofthefollowingisnotanadvantageofcloning cloningcanbeusedformedicalpurposes largequantitiesoffoodcanbeproducedbycloning cloningcanhelpkeepanimalsfrombecomingextinct famouspersonswhohavepassedawaycanbecloned 5 whatispeople sfearabouthumancloning whichofthefollowingiswrong clonedhitlerswoulddoharmtotheworld clonedpeoplemaybekilledatwillformedicalaid awomanwouldhavedifficultyrecognizingherrealhusband menwilldieoutbecauseawomancangivebirthtoababywithoutahusband 6 thecloningofdollythesheepsucceededbecause a itseasiertocloneasheepthanotheranimalsb thescientistsweredeterminedandworkedhardwithpatiencec thescientistswererewardedandgotlotsofmoneyd manyotherattemptstoclonemammalsfailed 7 thelambisthecloneofthecellfromsheepbecause a itprovidestheeggcellb itgivesbirthtothelambc itprovidesthenucleusd itisafemalesheep fillinthechartusingtheinformationfromthetext addonereasonofyourownineachcolumn carefulreadingreadthetextagainandfindoutth