Cov kws tshawb fawb tseem tab tom xav txog thaum twg qhov kev hloov pauv tau tshwm sim thiab lub qhov muag xiav tshwm sim hauv ib tus neeg, tab sis qee qhov cim qhia tias qhov no feem ntau yuav tshwm sim ntau xyoo dhau los. Lub sijhawm no, muaj kev sib haum xeeb loj ntawm Tebchaws Europe, vim kev ua liaj ua teb los ntawm Middle East pib kis mus rau cov tebchaws nyob sab Europe.
Keeb Kwm
Human Genetics magazine tau luam tawm tsab ntawv ceeb toom los ntawm cov kws tshawb fawb hais tias kev hloov pauv uas ua rau pom qhov muag xiav feem ntau tshwm sim nyob rau sab hnub poob ntawm thaj av Hiav Txwv Dub.
Xib fwb Eiberg tau sau tseg tias cov xim "default" ntawm tib neeg lub qhov muag yuav tsum yog xim av. Tsaus xiav ob lub qhov muag yog qhov tshwm sim ntawm kev hloov pauv, vim tias cov xim ntawm daim tawv nqaij tsaus, melanin, cuam tshuam rau cov menyuam mos liab qhov muag. Txawm li cas los xij, nyob rau sab qaum teb Europe, OCA2 noob tau hloov pauv uas cuam tshuam kev tsim cov melanin hauv iris, ua rau pom xiav.
xibfwb Eiberg taw qhia tias txhua tus neeg muaj qhov muag xim av thaum xub thawj, tab sis kev hloov pauv hauv peb cov chromosomes ntawm OCA2 noob ua rau "hloov pauv" uas "tawm" tib neeg lub peev xwm tsim xim av.
Hauv iris, tus nqi ntawm melanin txawv, thiab yog li ntawdxim av ntxoov yog txawv. Lub qhov muag xiav yog cov neeg uas muaj ib tug poj koob yawm txwv uas hloov cov noob. Lawv txhua tus tau txais kev hloov pauv tib yam hauv lawv cov DNA.
Blue-eyed txiv neej thiab poj niam muaj yuav luag zoo tib yam genetic sequences nyob rau hauv ib feem ntawm DNA molecule lub luag hauj lwm rau qhov muag xim.
Xib Fwb Eiberg tau txheeb xyuas DNA ntawm ntau dua 800 tus neeg, los ntawm cov tawv nqaij dawb-dawb Scandinavians mus rau cov neeg tawv nqaij tsaus tab sis qhov muag xiav, nyob hauv Turkey thiab Jordan. Nws qhov kev sim tau lees paub qhov kev xav ntawm ib tus poj koob yawm txwv.
Nws tsis paub meej vim li cas qhov muag xiav muaj ntau dua ntawm cov pej xeem ntawm Sab Qab Teb ntawm Russia thiab Northern Europe. Yav dhau los, nws tau xav tias qhov no ua rau muaj txiaj ntsig zoo nyob rau lub caij ntuj sov dawb hmo ntuj lossis lub caij ntuj no polar. Tej zaum qhov no suav hais tias yog qhov ntxim nyiam tshaj plaws thiab yog li qhov zoo tshaj plaws rau kev xaiv kev sib deev.
Ntse
Anatomically, iris suav nrog ectodermal thiab mesodermal txheej. Yuav ua li cas cov pigment faib nyob rau hauv lawv txiav txim cov xim. Chromatophores yog faib nyob rau hauv mesodermal txheej, lawv muaj melanin. Cov txheej tom qab muaj ntau cov xim xim uas muaj fuscin.
Cov fibers thiab cov hlab ntsha ntawm iris kuj ua lub luag haujlwm.
Lub teeb xim tseem ceeb yog xiav, xiav thiab grey.
Cov txheej ectodermal muaj xim xiav tsaus. Yog hais tias cov txheej txheej sab nraud ntawm IRIS muaj qhov ntom ntom thiab tsawg melanin cov ntsiab lus, tom qab ntawd loj zaus lub teebabsorbed los ntawm mesodermal txheej, thiab tsawg zaus lub teeb yog reflected los ntawm nws. Qhov muag xiav yog qhov tshwm sim ntawm qhov kev cuam tshuam zoo li no.
Muaj cov neeg npau suav hloov lawv cov xim ntuj rau xiav. Lawv ntseeg tias qhov zoo yuav tau txais kev zoo nkauj, qhov tob thiab kev nplua nuj. Feem ntau, lub qhov muag xiav yog suav tias yog qhov txaus nyiam, cov duab ntawm cov neeg lub qhov muag xiav tuaj yeem dai kom zoo nkauj siv qee qhov kev pab cuam, tshwj xeeb, Photoshop. Los ntawm kev sim nrog cov teebmeem hauv computer, koj tuaj yeem xaiv qhov tsim thiab tshuaj pleev ib ce rau koj tus kheej.
