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1、aonusr癜E招(话题导人提到克隆,似乎每个人都略知一二。但是,你真的知道什么是克隆吗?你知道克隆技术的发展历史吗?Theterm“cloning“。describesaTumberofdif5erentprocesscsthatcanbeuSedtoDroduce,genetical1ytdenticalcopiesofabiologicalentity(实体),The。copiedmaterial,Whichhasthe“samegeneticmakeup“aSthe“original,isreferredtoaSaclone.Researchershaveclonedawiderang
2、eofbiologicalmaterials,includinggenes,cel1s,tissuesandevenentireOrganisms,Suchas8Sheep.0verthepast50years,scientistshayveconductedcloningexperimentsinawiderangeofanimalsbyusingavarietyofecuninues。Jn1979,researehersDroducedthefirstgeneticallyidenticalmicebysplittingmouseembryos(胚胎)inthetesttubeandthe
3、nimplantingtheIesultingembryosintothewombsofadultfemaleShortlyafterthat,researchersproducedthefirstgroupofgeneticallyidenticalcows,sheepandchickensbytransferring(改变)thenucleusofacelltakenfromanearlyembryointoaneggthathadbeenemptiedofitsnucCleus.Itwasnotuntil1996,however,thatresearcherssucceedediclon
4、ingthefirstmammalfromamaturecel1takenfromanadultanimal。After276xttempts,ScottishIesearchersfinallyproducedDolly,thelambfromtheudder(牛、羊等的乳房)cellofa6-year-oldsheep.Twolater,IesearchersinJapanclonedeightcalyessinglecow,butonlyfoursurvived.Besidescattleandsheep,othermammalsthathayebeenclonedfromcellsin
5、clude:Cat,deer,dog,horse,0x,rabbitandrat。Inaddition,&kindofmonkeyhasbeenlclonedbyembryosplitting-G同步阅读Answer“theoLJowiny“aestions“accorning“to“theinformationgiveninthetext。1.Whatiscloning?戛灞2.Whenwasthefirstmammalcloned?【答案】1.Theterm“cloning“describesanumberofdifferentprocessesthatcanbeusedtoproduce
6、geneticallyidenticalcopiesofabiologicalentity、Thecopiedmaterial,WhichhastheSam:genailcm止efstaeorlginal;13referredtoaSaClone.2.Itwasclonedin1996.gG紫养拓展书面表达学了关于克隆的文章后,李明很有感触。他在日记中写道:“孩子的DNA来自父母。妈妈的嘴小,所以我的嘴也小;爸爷的烈暖元,所以我的限陷也大-场奶的个子矮,所迅我的个于也霓;他们部月一头黑友,所以我也有一头黑发。我非常想克隆一个我,然后我就不用“一上学,而让他萧我上学,我还能天天玩耍。那就太好了1“誓蘸_i请帮李明用英语完成这篇日记。【参考范文】Children“sDNAcomesfromtheirparents.Mother“smouthissmall,soismine.Father“seyesarebig,soaremine.Motherisshort,soamI.Bothofthemhaveblackhair,SodoL工wanttoctonams3J5yeryauch.Thendon“tneedtogotoschoo.Icouldalsoplayallday,andlethimgotoschoolinsteadofme.Thatwouldbegreatl!e吴梁
