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时间:2018-12-24
《(浙江专版)2018版高中英语 unit 2 cloning section ⅰ warming up & reading-preparing 新人教版选修8》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、Unit2 Cloning克隆实验开始于20世纪50年代,一步一个脚印的逐渐成熟。那么,到底什么是克隆呢?如何进行克隆呢?WHATISCLONING?Haveyoueverwishedyoucouldhaveacloneofyourselftodoyourhomeworkwhileyouwentouttoplaywithyourfriends?Imagineifyoucouldreallydothat,wherewouldyoustart?Whatexactlyiscloning?Cloningisawayofmakinganorganismthati
2、sanexactgeneticcopyofanother.ThismeansthateverysinglebitofDNAisthesamebetweenthetwo!Youmightnotbelieveit,buttherearehumanclonesamongusrightnow.Theyweren'tmadeinalab,though.They'reidenticaltwins,creatednaturally.Below,we'llseehownaturalidenticaltwinsrelatetomoderncloningtechnolog
3、ies.Howiscloningdone?YoumayhavefirstheardofcloningwhenDollythesheepshoweduponthescenein1997.CloningtechnologieshavebeenaroundformuchlongerthanDolly,though.Howdoesonegoaboutmakinganexactgeneticcopyofanorganism?Thereareacoupleofwaystodothis:artificialembryotwinningandsomaticcellnu
4、cleartransfer.Howdotheseprocessesdiffer?1.ArtificialEmbryoTwinningArtificialembryotwinningistherelativelylowtechversionofcloning.Asthenamesuggests,thistechnologymimicsthenaturalprocessofcreatingidenticaltwins.2.SomaticCellNuclearTransferSomaticcellnucleartransfer(SCNT),usesanapp
5、roachdifferentfromartificialembryotwinning,butitproducesthesameresult:anexactclone,orageneticcopy,ofanother.ThiswasthemethodusedtocreateDollythesheep.1.organismn. 有机体;生物体2.artificialadj.人工的,人造的3.transferv.转移4.relativelyadv.相对地;比较地5.mimicv.模仿;模拟1.Whatiscloning?Cloningisawayofmak
6、inganorganismthatisanexactgeneticcopyofanother.2.Whatarethetwowaysofcloningmentionedinthepassage?Artificialembryotwinningandsomaticcellnucleartransfer.SectionⅠ WarmingUp&Reading-Preparing根据提示写出下列单词1.vi. 不同,相异2.vt.着手,从事,承担3.vt.扔,投,掷4.vi.反对,不赞成5.vt.获得,赢得6.vt.获得;到达(水平、年龄、状况等)7.vt.禁
7、止,不准8.vt.&vi.积累,聚积9.adj.精确的,准确的10.n.突破【答案】 1.differ 2.undertake 3.cast 4.object 5.obtain 6.attain 7.forbid 8.accumulate 9.exact 10.breakthrough看单词 学构词:breakthrough为合成词,由break和through构成类似单词还有breakup“破裂”;breakdown“失败,损坏,破裂”等。根据提示补全下列短语1.pay得到好结果,取得成功,偿清2.theonehand一方面3.cast使失望,使沮丧
8、4.haveanimpact对……有影响5.present目前,现在6.favourof赞成,
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