Blue idanu - wani sakamako na maye gurbi

Masana kimiyya da duk da haka bayar da shawarar cewa maye gurbi ya faru, kuma akwai wani mutum blue idanu, amma wasu alamu sun nuna cewa, mafi m, shi ya faru a 'yan shekarun da suka gabata da suka wuce. A wannan lokacin, akwai taro mulkin mallaka na Turai, kamar noma a gabas ta tsakiya ya fara yada a Turai.

asalin

Journal of Human Genetics masana kimiyya sanya wani rubutu cewa maye gurbi, wanda ya sa bayyanar da idanu na blue launukansa, mafi m ya faru a arewa maso yamma da tekun Black Sea yankin.

Farfesa Eiberg aka nuna cewa, "default" launi adam idanu ya zama ruwan kasa. Duhu blue idanu - sakamakon maye gurbi, domin duhu fatar jiki pigment - melanin, rinjayar da bayyanar ruwan kasa-sa ido jariran haife. Duk da haka, a arewacin Turai OCA2 gene underwent canje-canje rushe samar da melanin a Iris, wanda ya kai ga bayyanar da blue color.

Farfesa Eiberg ce cewa ruwan kasa idanu sun na farko, amma maye gurbi a cikin mu chromosomes OCA2 gene sa da "canji" cewa "kashe" da ikon mutane don a samar da ruwan kasa launi.

A Iris dabam da adadin melanin, sabili da haka daban-daban ruwan kasa launukansa. Blue idanu mutanen da suke da magabata suka canza a gene. Dukan su sun gaji guda maye gurbi a cikin DNA.

Blue-sa ido maza da mata da kusan m kayyade jerin wani ɓangare na cikin jigidar halittar DNA, wadda ke da alhakin ido launi.

Farfesa Eiberg da aka gudanar DNA bincike na fiye da mutane 800 daga fari-skinned Scandinavian mai farin gashi zuwa duhu-skinned mutane, amma tare da blue idanu, da suke zaune a Turkey da kuma Jordan. Gwajinsa tabbatar da jarrabawa guda magabata.

Yana da m dalilin da ya sa blue idanu mafi tartsatsi a cikin jama'ar na Kudu na Rasha da kuma arewacin Turai. A baya can da aka zaci cewa wannan siffa ba a wasu amfani a lokacin rani da tsakar dare rana ko na iyakacin duniya hunturu. Watakila wannan yana dauke su more m, kuma, saboda haka, mafi m ga jima'i selection.

Features

Anatomically Iris hada ectodermal da mesodermal Layer. Kan yadda za a raba su pigment da kuma dogara a kan launi. Chromatophores aka rarraba a cikin mesodermal Layer, suka dauke melanin. A backsheet qunshi yawa pigmented Kwayoyin cika fustsinom. Taka rawa a matsayin zaruruwa da Iris tasoshin.

Key haske launuka - blue, blue, da launin toka.

Ectodermal Layer muhimmi a cikin duhu blue color. Idan waje zaruruwa na Iris da low yawa, kuma a low abun ciki na melanin, da high mita haske ne tunawa mesodermal Layer da low mita haske da aka nuna daga gare ta. Blue idanu - wani sakamako na wannan index.

Akwai mutanen da suke mafarki ya canza halitta launi zuwa blue. Sun yi imani da cewa view a lokaci guda samun da kyakkyawa, da zurfi da richness. Mafi sau da yawa yana nufin da m blue idanu hoto blue-sa ido mutane za su iya yi ado ta amfani da wasu shirye-shirye, kamar Photoshop. Bayan gwaji da kwamfuta effects, za ka iya sama fitar da daidai da kayan shafa da kuma kayan shafawa.