Kutheni kukho umntu?

Izizathu ubukho amadoda kudala ishwangusha iingqondo izazinzulu. ukuzala yinto olungasebenziyo imali eninzi, kodwa ke iintlobo ezininzi multicellular ukhetha le ndlela ukugcina yofuzo. Oku akukho ngqiqweni. Ngoko kutheni na kukho umntu? Abaphandi ukusuka University of East Anglia bakholelwa ukuba, mhlawumbi, ekugqibeleni echachambileyo ikhowudi. Bacebise ukuba amandla yendaleko, eyaziwa ngokuba ukhetho ngokwesini kudlala indima ephambili ekuphuculeni impilo yoluntu kunye nokhuselo iintlobo ekutshabalaleni.

yophando olutsha

Kuphononongo kalindixesha Nature, a zenyathi beetle Tribolium kukhethwe amazwi ukuze siqonde ukuba kutheni uninzi eziphilayo multicellular bakhetha uhlobo ngesondo yokuzala. Phantsi kweemeko laboratory ilawulwa, abaphandi wafunda izizukulwana 50 looqongqothwane iminyaka elishumi yaye baphenjelelwa Ukukhetha ngokwesondo. Ukuba uthathe njengesiseko kwithiyori Charles Darwin thina, ukhetho ngokwesondo yinkqubo apho eyindoda kukhuphisana ithuba lokwanda, kunye nabasetyhini bakhetha abo bakulungele ukuvelisa inzala.

point Scientific ngayo

"Phantse zonke iintlobo multicellular on Earth lokuyivelisa ngokwabelana ngesondo, kodwa ubukho balo akukho lula ukuba achaze, kuba olu hlobo kuzisa imithwalo ezinkulu kwaye ifuna iindleko ezibalulekileyo eneji. Ukongeza, i ezicacileyo kukuba kuphela isiqingatha kwinzala yakho, amadodakazi eneneni ziye inzala. Kutheni iintlobo uchitha ixesha namandla abo kwesa koonyana? " - ubonisa lead Umphandi UNjingalwazi Mett Geydzh yeSikolo UEA, uthe kwingxelo.

umsebenzi wophando

"Sasifuna ukuqonda indlela ukhetho kaDarwin wayekelela lo mhlola ngokubanzi, yaye kutheni inkqubo sokuzala neyilahleko kangaka Emva kokuba inkqubo apho bonke abantu kuvelisa inzala ngaphandle ngesondo, njengoko kuzo zonke abemi maqanda, bekuya kuba kakuhle kakhulu ngakumbi." - kufezekiso lwale kwi sifundo.

Iziphumo zovavanyo

Izazinzulu ziye zafumanisa ukuba xa khuphiswano sisusiwe, kwaye Kwathunyelwa kuphela ngababini oyedwa, impilo a zoluntu simbi. Kwelinye icala, le inzala wafumana phantsi ukhuphiswano olungamandla xa amadoda 90 waba iimazi-10, baba ziyamelana izifo kunye yokutshabalala.

"Ukuze ibe intle azinakuze ezikhuphisanayo kukutsalela amaqabane, umntu kufuneka abe kakuhle izinto ezininzi, ukuze ukukhethwa ngokwesini i filter ezibalulekileyo ngempumelelo ukugcina nokuphucula impilo genetic yabemi - utsho yobu- -. Iziphumo zethu ukunika inkxaso ngqo ingcamango ukuba isini iyakuqhuba ikhona ndlela lubalaseleyo yokuzala, kuba likuvumela ukuba wenze ukhetho kwezesondo, ukuqinisekisa ukuba ezi inzuzo ezibalulekileyo. "

Uphononongo lubonisa ukuba isenzeko yokukhethwa ngokwesondo idlala indima ebaluleke kakhulu kwi ukuhluzwa kwiDNA eziyingozi, ekubeni ukhuphiswano akanakufane ewakhwelayo inkunzi nemazi zemfuza awukho.