Lub qhov muag xiav yog qhov tshwm sim ntawm kev hloov

Cov kws tshawb fawb tseem yog kev sib tw xwb thaum muaj kev hloov, thiab tus neeg muaj qhov muag xiav, tab sis qee cov cim qhia tau tias, feem ntau, nws tshwm sim ntau xyoo dhau los. Thaum lub sij hawm no lub sij hawm muaj cov pejxeem loj ntawm teb chaws Europe, li kev ua liaj ua teb los ntawm Middle East pib kis mus rau cov teb chaws Europe.

Keeb kwm

Journal of Human noob caj noob ces zaum muab tso rau ib daim ntawv uas hloov, uas tshwm sim los ntawm cov tsos ntawm lub qhov muag ntawm xiav hues, feem ntau yuav tshwm sim nyob rau hauv lub qaum teb hnub poob ntawm lub Dub hiav txwv cheeb tsam.

Professor Eyberg tau sau tseg tias "yog lub neej" qhov xim ntawm tib neeg lub qhov muag yuav tsum xim av. Xiav lub qhov muag xiav yog qhov tshwm sim ntawm kev hloov, vim qhov tsaus xim tawv nqaij yog melanin, nws cuam tshuam rau cov tsos mob ntawm cov xim daj thiab eyed cov me nyuam. Txawm li cas los xij, nyob rau sab qaum teb Europe, lub OCA2 noob underwent cov kev hloov uas cuam tshuam qhov zus ntawm melanin nyob rau hauv IRIS, uas coj mus rau cov tsos ntawm ib xiav xim.

Xibfwb Eiberg hais tias xim av ob lub qhov muag twb thawj ntawm tag nrho cov, tab sis change nyob rau hauv peb chromosomes OCA2 noob tshwm sim los ntawm "transformation" hais tias "tua" cov muaj peev xwm ntawm cov neeg yuav tsim ib xim av xim.

Nyob rau ntawm iris, qhov nyiaj melanin nws txawv, yog li ntawd xim av ntxoov yog txawv. Cov qhov muag xiav muaj cov neeg uas tau muaj poj koob yawm txwv uas hloov cov noob. Lawv txhua tus tau txais qhov kev hloov tib yam ntawm lawv cov DNA.

Cov txiv neej thiab poj niam xiav xiav muaj qhov sib luag ntawm cov caj ces DNA uas yog lub luag hauj lwm ntawm qhov muag xim.

Prof. Eyberg tshawb nrhiav DNA ntau tshaj li 800 tus neeg, los ntawm Dawb Scandinavian blondes rau cov neeg uas tsaus nti ntawm daim tawv nqaij, tab sis nrog xiav qhov muag nyob hauv Qaib Cov Txwv thiab Jordan. Nws cov kev sim paub tseeb tias qhov kev xav ntawm ib qho txwv zeej txwv koob.

Nws yog tsis totaub yog vim li cas xiav ob lub qhov muag ntau ntau ntawm cov pej xeem ntawm lub South ntawm Russia thiab Northern teb chaws Europe. Yav tas los nws twb assumed tias qhov no feature muab ib tug tej yam kom zoo dua nyob rau hauv lub caij ntuj sov ib tag hmo hnub los yog lub ncov qaumteb qabteb lub caij ntuj no. Tej zaum qhov no yog xav paub ntau txaus nyiam thiab, yog li ntawd, qhov feem ntau yog rau kev sib deev xaiv.

Nta

Anatomically iris muaj xws li ectodermal thiab mesodermal txheej. Yuav ua li cas lub pigment yog faib nyob rau hauv lawv, thiab xim nyob ntawm. Chromatophores yog muab faib rau hauv lub mesodermal txheej, lawv muaj melanin. Cov txheej txheem rov tom qab muaj ntau lub qog pigment hlwb nrog fuscin. Fibers thiab cov hlab ntsha ntawm lub iris kuj ua si.

Lub ntsiab xim yog xim xiav, xiav thiab grey.

Ectodermal txheej xam qhovkev nyob rau hauv qhov tsaus ntuj nti xim xiav. Yog hais tias lub sab fibers ntawm iris muaj tsawg ceev thiab tsis tshua muaj melanin cov ntsiab lus, lub teeb ci siab yog absorbed los ntawm cov txheej txheem mesodermal, thiab lub teeb uas tsis tshua muaj pom los ntawm nws. Lub qhov muag xiav yog qhov tshwm sim ntawm kev zeem muag no.

Muaj cov neeg uas npau suav ntawm hloov lawv cov xim ntsuab rau xiav. Lawv ntseeg tias kev saib tib lub sijhawm yuav tau txais kev zoo nkauj, qhov tob thiab kev nplua nuj. Feem ntau, qhov muag xiav yog qhov zoo nkauj, cov duab neeg xiav-eyed yuav tsum tau decorated siv qee qhov kev pab cuam, hauv particular, photoshop. Tom qab sim nrog lub computer los, koj tuaj yeem khaws koj cov pleev thiab cov pleev kom zoo.