高中英语unit2cloningsectionⅰwarmingup&amp；reading_pre_reading教学案新人教版选修8

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1、Unit2CloningSectionⅠWarmingUp&；Reading-Pre-reading非常感谢上级领导对我的信任，这次安排我向股份公司述职，既是对我履行职责的监督，也是对我个人的关心和爱护，更是对**百联东方商厦有限公司工作的高度重视和支持。Haveyoueverwishedyoucouldhaveacloneofyourselftodoyourhomeworkwhileyouwentouttoplaywithyourfriends?Imagineifyoucouldreallydothat,wherewou

2、ldyoustart?Whatexactlyiscloning?Cloningisawayofmakinganorganism(有机体)thatisanexactgenetic(基因的)copyofanother.ThismeansthateverysinglebitofDNAisthesamebetweenthetwo!Youmightnotbelieveit,buttherearehumanclonesamongusrightnow.Theyweren'tmadeinalab,though.They'reidentical(

3、同样的)twins,creatednaturally.Below,we'llseehownaturalidenticaltwinsrelatetomoderncloningtechnologies.Howiscloningdone?YoumayhavefirstheardofcloningwhenDollythesheepshoweduponthescenein1997.CloningtechnologieshavebeenaroundformuchlongerthanDolly,though.Howdoesonegoabout

4、makinganexactgeneticcopyofanorganism?Thereareacoupleofwaystodothis：artificialembryotwinning(人工胚胎双生)andsomaticcellnucleartransfer(体细胞核移植).Howdotheseprocessesdiffer?1．ArtificialEmbryoTwinningArtificialembryotwinningistherelativelylowtechversionofcloning.Asthenamesugges

5、ts,thistechnologymimicsthenaturalprocessofcreatingidenticaltwins.2．SomaticCellNuclearTransferSomaticcellnucleartransfer(SCNT),usesanapproachdifferentfromartificialembryotwinning,butitproducesthesameresult:anexactclone，orageneticcopy,ofanother.Thiswasthemethodusedtocr

6、eateDollythesheep.Section_ⅠWarmingUp&Reading—Prereading[原文呈现][读文清障]CLONING：WHEREISITLEADINGUS?Cloninghasalwaysbeenwithusandis①exact/Iɡ'zækt/adj.精确的；准确的②makeacopyof(＝copy)复制非常感谢上级领导对我的信任，这次安排我向股份公司述职，既是对我履行职责的监督，也是对我个人的关心和爱护，更是对**百联东方商厦有限公司工作的高度重视和支持。heretostay.Itisaw

7、ayofmakinganexact①copyof②anotheranimalorplant.Ithappensinplantswhengardenerstakecuttings③fromgrowingplantstomakenewones.Italsohappensinanimalswhentwins④identical⑤insexandappearanceareproducedfromthesameoriginalegg.Thefactisthatthesearebothexamplesofnaturalclones⑥.ofm

8、aking...作way的定语。③cutting/'kʌtIŋ/n.剪枝；剪报；剪纸④twin/twIn/n.双胞胎之一；孪生儿之一adj.成对的；成双的⑤identical/aI'dentIkl/adj.同一的；一模一样的⑥Thefactisthat...中，