Amehlo aluhlaza okwesibhakabhaka yiphumo lokuguquka

Iingcali zenzululwazi zisacinga nje ukuba kukho ukuguquka komntu, kwaye umntu unamehlo aluhlaza, kodwa ezinye iimpawu zibonisa ukuba, mhlawumbi, kwenzeka emva emashumi eminyaka edlulileyo. Ngeli xesha kwakukho abantu abaninzi baseYurophu, njengoko ezolimo zaseMiddle East zaqala ukusasazeka kumazwe aseYurophu.

Umvelaphi

Umagazini we-Human Genetics wabhala inqaku lenzululwazi ukuba ukuguqulwa kwezinto ezibangele ukubonakala kwamehlo ahlaza okwesibhakabhaka kunokwenzeka ukuba kwenzeke kumntla-ntshona we-Black Sea.

UProfesa Eyberg wathi "ngokungagqibekanga" umbala wamehlo omntu kufanele ube mnyama. Amehlo aluhlaza okomvu unomphumo wokuguqulwa komzimba, kuba i-skin pigment i-melanin, ichaphazela ukubonakala kweentsana ezinamabala omdaka. Nangona kunjalo, eNyakatho yeYurophu, i-OCA2 yegazi yenze iinguqu ezaphazamisa ukuveliswa kwe-melanin kwi-iris, eyabangela ukubonakala kombala obomvu.

UNjingalwazi u-Eyberg wathi zonke amehlo zinamabala omdaka ekuqaleni, kodwa ukuguqulwa kwama-chromosomes ethu kwi-OCA2 igulo kubangela "utshintsho" oluthi "luyeke" ukukwazi abantu ukuveza umdaka.

Kwi-iris, inani le-melanin lihluka, ngoko i-brown shades ihluke. Amehlo aluhlaza aphethe abantu abanomnye okhokho owaziwayo. Bonke bazuze iinguqu ezifanayo zeDNA yabo.

Amadoda kunye nabasetyhini abanamehlo aluhlaza okwesibhakabhaka banokulandelelana kohlobo lwe-DNA elandelelanayo nombala weso.

UProf. Eyberg wenza uhlalutyo lwe-DNA lwabantu abangaphezu kwe-800, ukusuka kumhlophe ama-Scandinavian blondes kubantu abanobukhuni obumnyama, kodwa ngamehlo aluhlaza ohlala eTurkey naseJordan. Uvavanyo lwakhe lwaluqinisekisile ingcamango yokhokho oqhelekileyo.

Akucaci ukuba kutheni amehlo ahlaza okwesibhakabhaka aqhelekileyo phakathi kwabantu baseMzantsi Russia neNyakatho Yurophu. Ngaphambili kwakucatshulwa ukuba le nxalenye inika inzuzo kwihlobo lobusuku obusika okanye kwi-polar yasebusika. Mhlawumbi oku kukhangelwa kakhulu, kwaye ngoko ke, okona kulungele ukhetho lwezesondo.

Izixhobo

I-Anatomically, iris iquka uhlaka lwe-ectoderm kunye ne-mesodermal. Indlela i-pigment isasazwa kuyo, kunye nombala kuxhomekeke. I-Chromatophores isasazwa kumgca we-mesodermal, iqukethe i-melanin. Uluhlu lwangemuva luqukethe iiseli ezininzi ze-pigment ezizaliswe yi-fuscin. Iifibers kunye neempahla ze-iris nazo zidlala indima.

Imibala elula yokukhanya iluhlaza okwesibhakabhaka, eluhlaza okwesibhakabhaka kunye negrey

Uluhlu lwe-ectodermal lubonakaliswe ngumbala obomvu obumnyama. Ukuba ii-fibri zangaphandle ze-iris zinomxholo ophantsi kunye ne-melanin ephantsi, ukukhanya kwe-high-frequency kubanjwe ngumgca we-mesodermal, kwaye ukukhanya okuphantsi kwe-frequency kubonakala kuyo. Amehlo aluhlaza aluyiyo yiphumo yolu hlobo.

Kukho abantu abaphuphayo ukutshintsha umbala wabo wendalo ohlaza okwesibhakabhaka. Bakholelwa ukuba ukubukeka ngexesha elifanayo kuya kufumana ubuhle, ubunzulu kunye nobutyebi. Ngokuqhelekileyo, amehlo aluhlaza akhangeleka, iifoto zabantu abanamehlo aluhlaza zingahlotswa ngokusebenzisa ezinye iiprogram, ngakumbi i-photoshop. Emva kokuzama iimiphumo zekhompyutheni, unokwenza i-makeup yakho kunye nokwenza kakuhle.