高中英语：unit2 cloing教学学案人教版选修8.doc

《高中英语：unit2 cloing教学学案人教版选修8.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Unit2cloningWarmingup:1．Useyourownlanguagetodescribethefourpictures.Picture1.---Itisthemostfamoussheepintheworld.DoyouknowhowDollyisdifferentfromothersheep?___________________________________________________________________Picture2.---whatcanyouseeinthe

2、picture?_____________________________________________________________________Picture3.---whocutthestemofftheplant?Whatishegoingtodo?_____________________________________________________________________picture4---whatdoyouknowbouttwins?__________________

3、___________________________________________________Cloningcanbedividedintotwokinds:------isonethatoccursfromthe“parent”inanaturalformofcloningwithouthumanhelp.-------isonethatproducedthroughhumanintervention(介入).2.languagepointsDiffer:3.Whatiscloning?Pr

4、e-readingHowisacloneproduced?Thecloningofplantsissimpleandrelativelyeasy.Itcanbedonebytakingcuttings(man-madecloning)orlettingtheplantproduceitsownrunners(naturalcloning).Thecloningofanimalsismorecomplicated.Itwasnotachieveduntil1996andisfullyexplainedi

5、nthefirstreading.ReadingStep1.SkimmingWhat’sthetextmainlyabout?4Writetheletter“T”ifthestatementistrue.Write“F”ifitisfalse.1.Cloningmeansmakingacopyofananimaloraplant.2.Gardenerscanmakealotofmoneybycloningplants.3.Cloninganimalsisascomplicatedascloningpl

6、ants.4.Dollythesheepwasthefirstsuccessfulcloneofamammal5.Naturalcloneshappeninanimalsaswillasinplants.Step2.Findthemainideaofeachparagraph.1.Cloningis______________________________2.Cloninghas____________uses.3.The_________ofDolly.4.The________ofDolly.5

7、.Itis__________toclonehumanbeings.Step3.ScanningChoosetherightansweraccordingtothetext.1.Dollythesheep_____.A.lookedexactlylikethesheepthatprovidestheegg.B.wastheexactcopyofthesheepthatprovidesthenucleus.C.lookedlikethesheepthatgavebirthtoit.D.hadthecha

8、racteristicsofallthreesheep2.Itcanbeinferredfromthepassagethataclonedanimal_____.A.usuallylivesaslongastheoriginaloneB.usuallyliveslongerthantheoriginaloneC.usuallyliveslongerthantheoriginaloneD.isusuallyashealthyastheoriginalone