Tag nrho cov xiav-eyed neeg koom los ntawm ib tug tshaj plaws

Muaj yog ib tug hypothesis hais tias cov xiav-eyed tib neeg muaj ib qho txwv zeej txwv koob. Lawv yog ib qho ancient European, uas nws muaj hnub nyoog yog rau mus rau kaum txhiab xyoo. Nws nrhiav tau ib qho kev tshuaj ntsuam genetic hloov, vim hais tias cov neeg uas muaj lwm painting ntawm lub iris.

Yuav ua li cas koom siab ua ke rau hauv lub dav xiav-eyed

Chiv, tag nrho cov neeg nyob xim av-eyed. Txawm li cas los, kev tshuaj ntsuam genetic hloov, nrog rau cov muaj feem xyuam rau OCA2 noob, coj mus rau rov tshwm sim ntawm ntau cov chaw ntxoov xim av. Raws li cov ntaub ntawv no, tus neeg tshawb fawb twb sim mus nrhiav rau qhov chaw ntawm cov xim, uas yog lub luag hauj lwm rau xiav ob lub qhov muag nyob rau hauv OCA2 noob, tab sis yuav tsis muaj avail.

zaum nyuam qhuav ua ib tug foundations: qhov ua rau ntawm cov kob xiav-eyed neeg dag nyob rau hauv HERC2 ze noob change. Qhov ntawd yog OCA2 noob uas txiav txim seb tus nqi ntawm melanin (xim av xim), tsis ntxim rau cov coloration ntawm lub iris rau xiav. Zaum ntseeg tau hais tias qhov no hloov ua ntej tshwm sim thaum muaj ib tug loj tsiv teb tsaws ntawm cov neeg los ntawm teb chaws Africa los cov teb chaws Europe. Tau hais tias cov neeg uas muaj kob xiav qhov muag - cov xeeb leej xeeb ntxwv ntawm Europeans uas nyob rau hauv ancient sij hawm.

Qhov no hypothesis yog paub tseeb hais tias los ntawm qhov tseeb hais tias txhua txhua xiav-eyed neeg muaj tib lub hloov. Nws tsis qhia cov cwm pwm ntawm uas ntau txwv zeej txwv koob.

Archaeologists tau pom lub cev pob txha nyob rau hauv sab qaum teb ntawm Spain, uas muaj kob xiav qhov muag. Muaj hnub nyoog lub cev pob txha - 7000 xyoo. Lawm, lub qhov muag nws twb pom, tab sis kev tshuaj ntsuam genetic tsom xam muaj pov thawj hais tias muaj yog ib tug hloov ntawd thiab pleev xim rau iris xiav.