（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

《（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，