Ithimba labacwaningi bamazwe ngamazwe e-Max Planck Institute for Evolutionary Anthropology eJalimane lenze intuthuko ephawulekayo - ngokokuqala ngqá liye laphumelela ukuhlukanisa i-DNA yomuntu entweni yenkathi endala kakhulu ye-Stone Age.
Abacwaningi bathola i-DNA ezinyo elase lineminyaka engu-20,000 ubudala futhi lilenga emgexoni. Le nqubo entsha izosenza sifunde okwengeziwe ngezihlobo zethu zokuqala.
Kuye kwatholakala izinyo lezinyamazane emhumeni odumile waseDenisova ezintabeni zase-Altaige eningizimu yeSiberia, osekunezinkulungwane zeminyaka iyikhaya lamaHomo sapiens kanye neDenisova engasekho.
Abacwaningi badale iphrofayili yofuzo lomthwali we-pendant kusuka kumasampula e-DNA. Banquma ukuthi kwakungowesifazane ohlobene nabantu basenyakatho ye-Eurasia owayehlala ikakhulukazi empumalanga ekude eSiberia.
Isinyathelo esibalulekile sokusebenzisa indlela entsha ye-DNA ukuwasha ngokuphelele
Ososayensi benze indlela yokukhipha i-DNA emangqamuzaneni esikhumba, umjuluko noma olunye uketshezi lomzimba olushumekwe kuma-pore material. Ngakho-ke, uma othile wayethinte amathambo noma amazinyo eminyakeni engu-20,000 XNUMX edlule, ngokwesibonelo, kungenzeka ukuthi abacwaningi manje sebengayihlukanisa i-DNA.
Ngokuka-Elena Essel, umcwaningi oholayo, inani le-DNA yomuntu esingalithola cishe lihlaba umxhwele njengokungathi sinezinyo lomuntu.
Le nqubo ihlaba umxhwele kakhulu ngoba ayihlaseli ngokuphelele futhi ayicekeli phansi.
Ngemva kokuhlola amakhemikhali ahlukene emathanjeni nasemazinyweni, ithimba laseJalimane lathola ukuthi kwanele ukuhlanza kahle amathambo esixazululweni se-phosphate namanzi afudumele - okwenza kube lula ukubona i-DNA. Ukugeza ngokuphelele futhi kunenzuzo yokukhipha ama-pores nezimbobo ezincane, ezingaqukatha izinsalela ze-DNA.
Ngokusho kuka-Essel, kungenzeka ukugeza izinto zakudala ngohlobo lomshini wokuwasha oklanyelwe le njongo. Ngokuwageza emazingeni okushisa afinyelela ku-90 degrees, ama-molecule e-DNA akhishwa emanzini okugeza ngaphandle kokubeka engcupheni into yokuqala.
Kuvulwe isahluko esisha socwaningo lwezakhi zofuzo
Ngokusho the isihloko socwaningo eshicilelwe kumagazini i-Nature, izazi ze-anthropologists ezivela kwa-Max Planck Institute zithi inqubo yabo ye-DNA esanda kuthuthukiswa izoba isiqalo sesigaba esisha socwaningo lwezakhi zofuzo zangaphambi komlando.
Abavubukuli kanye nezazi ze-anthropologists zazivame ukungabi namathuba okuthola ukuthi ngubani ophethe amathuluzi, ubucwebe nezinto zomuntu ezenziwe ngamathambo namazinyo. Kodwa manje bangathola ukuqonda okubalulekile kubo.
Ngokusebenzisa le ndlela, uqinisekisa ukuthi izinto nabantu baxhumene kakhulu, kwakheka isithombe esinemininingwane nesiyinkimbinkimbi sabantu, imiphakathi yabo namasiko ezinkulungwane zeminyaka edlule.
