关于克隆的英语作文

关于克隆的英语作文

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＇sexperiencewithcloninganimalsleaveshimupsetbyallthistalkofhumanclonin g.inthreeyearsofworkonthemissyproject,usinghundredsuponhundredsofdo g＇seggs,thea&mteamhasproducedonlyadozenorsoembryos(胚

胎)carryingmissy＇sdna.nonehavesurvivedthetransfertoasurrogate(代孕的)mother.thewastageofeggsandthemanyspontaneouslyabortedfetuses(胎)maybeacceptablewhenyou＇

redealingwithcatsorbulls,heargues,butnotwithhumans.cloningisincrediblyi nefficient,andalsodangerous,hesays.evenso,dogcloningisacommercialoppo rtunity,withaniceresearchpayoff.eversincedollythesheepwasclonedin1997, westhusin＇sphonehasbeenringingwithpeoplecallinginhopesofduplicatingtheircatsand dogs,cattleandhorses.alotofpeoplewanttoclonepets,especiallyifthepriceisri ght,sayswesthusin.costisnoobstacleformissy＇smysteriousbillionaireowner;he＇sputup$3.7millionsofartofunda&m＇sresearch.contrarytosomemediareports,missyisnotdead.theownerwantsat wintocarryonmissy＇

sfinequalitiesaftershedoesdie.theprototypeis,byallaccounts,athletic,good-naturedandsupersmart.missy＇

smasterdoesnotexpectanexactcopyofher.heknowsherclonemaynothaveher temperament.inastatementofpurpose,missy＇

sownerandthea&mteamsaytheyarebothlookingforwardtostudyingthewayst hatherclonesdifferfrommissy.besidescloningagreatdog,theprojectmaycontr ibuteinsightintotheoldquestionofnaturevs.nurture.itcouldalsoleadtotheclo ningofspecialrescuedogsandmanyendangeredanimals.however,westhusinis cautiousabouthiswork.heknowsthatevenifhegetsadogpregnant,theoffsprin g,shouldtheysurvive,willfacetheproblemsshownatbirthbyotherclonedanim als:abnormalitieslikeimmaturelungsandheartandweightproblems~whywou ldyoueverwanttoclonehumans,westhusinasks,whenwe＇renotevenclosetogettingitworkedoutinanimalsyet?