关于克隆的英语作文

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关于克隆的英语作文写一篇关于克隆的文章，要有反对克隆的原因和赞同克隆的原因，还要有自己的观点

westhusin＇sexperiencewithcloninganimalsleaveshimupsetbyallthistalkofhumancloning.inthreeyearsofworkonthemissyproject,usinghundredsuponhundredsofdog＇seggs,thea&mteamhasproducedonlyadozenorsoembryos(胚胎)carryingmissy＇sdna.nonehavesurvivedthetransfertoasurrogate(代孕的)mother.thewastageofeggsandthemanyspontaneouslyabortedfetuses(胎)maybeaeptablewhenyou＇redealingwithcatsorbulls,heargues,butnotwithhumans.cloningisincrediblyinefficient,andalsodangerous,hesays.

evenso,dogcloningisamercialopportunity,withaniceresearchpayoff.eversincedollythesheepwasclonedin1997,westhusin＇sphonehasbeenringingwithpeoplecallinginhopesofduplicatingtheircatsanddogs,cattleandhorses.alotofpeoplewanttoclonepets,especiallyifthepriceisright,sayswesthusin.costisnoobstacleformissy＇smysteriousbillionaireowner;he＇sputup$3.7millionsofartofunda&m＇sresearch.

contrarytosomemediareports,missyisnotdead.theownerwantsatwintocarryonmissy＇sfinequalitiesaftershedoesdie.theprototypeis,byallaounts,athletic,good-naturedandsupersmart.missy＇smasterdoesnotexpectanexactcopyofher.heknowsherclonemaynothavehertemperament.inastatementofpurpose,missy＇sownerandthea&mteamsaytheyarebothlookingforwardtostudyingthewaysthatherclonesdifferfrommissy.

besidescloningagreatdog,theprojectmaycontributeinsightintotheoldquestionofnaturevs.nurture.itcouldalsoleadtothecloningofspecialrescuedogsandmanyendangeredanimals.

however,westhusiniscautiousabouthiswork.heknowsthatevenifhegetsadogpregnant,theoffspring,shouldtheysurvive,willfacetheproblemsshownatbirthbyotherclonedanimals:abnormalitieslikeimmaturelungsandheartandweightproblems~whywouldyoueverwanttoclonehumans,westhusinasks,whenwe＇renotevenclosetogettingitworkedoutinanimalsyet?