Umbala wamehlo wezingane kungenzeka ushintshe ngokuhamba kwesikhathi. Umbala wamehlo womntwana unqunywa yizinto ezibizwa ngokuthi i-melanin. I-Melanin i-pigment emnyama equkethe iris , isakhiwo esilawula ukuthi ukukhanya okuningi kuvunyelwe kanjani iso. Umbala we-iris unqunywa inani le-melanin e-iris.
Amehlo alula ane pigment encane kakhulu, kanti amehlo amnyama athile kakhulu.
Ezinganeni, inqubo ye-pigmentation ye-iris ingakapheli. Izingane ezinesikhumba esimnyama zivame ukuzalwa ngamehlo amnyama ahlale emnyama. Umbala we-Iris ebantwaneni abakhanyisa ukukhanya okuvame ukuba ngumbala ohlaza okwesibhakabhaka noma ohlaza okwesibhakabhaka ekuzalweni, bese ushintsha njengoba bekhula. Ukukhiqizwa kwe-Melanin kuyashintsha phakathi nonyaka wokuqala wokuphila, ngokuvamile kubangele umbala omnyama, ojulile weso.
Ngabe i-Eye Color Color Set?
Umbala wamehlo unomphela awusethiwe kuze kube yilapho ingane ingenani izinyanga eziyisishiyagalolunye ubudala, ngakho-ke ulinde kuze kube usuku lokuqala lokuzalwa kwengane yakho ukuthola ukuthi imbala izoba yini. Ngisho noma kunjalo, ngezinye izikhathi ungathola izinto ezingamangazi. Izinguquko zombala ezicashile zisengenzeka kuze kube sekupheleni kweminyaka emithathu ubudala. Isibonelo, amehlo aluhlaza kancane kancane i-hazel noma i-hazel ingancipha kancane kancane ibe mnyama omnyama. Umbala wengane usana uthonywa umbala wamehlo wabazali bawo. Umbala wamehlo uvame ukutadisha emkhakheni wezakhi zofuzo ngenxa yamaphethini ayo efa kodwa namanje awuqondi kahle.
Amaphethini wefa lombala we-Eye alula kakhulu kunalokho esikufundayo ezakhiweni zofuzo ezifundiswa esikoleni esiphakeme se-biology. Umbala wokugcina wengane wakho uncike kakhulu kuwe noshade naye. Sasivame ukucabanga ukuthi leso sibhakabhaka sasinamandla futhi sibuluhlaza okwesibhakabhaka sasicindezelekile. Kodwa isayensi yanamuhla ibonise ukuthi umbala wamehlo akuyona neze elula.
Umbala wamehlo ulawulwa yizakhi zofuzo eziyisisekelo eziyisithupha. Abacwaningi baqonda ezimbili zalezi zakhi zofuzo kahle futhi enye yazo isengumfihlakalo. Lezi zakhi zofuzo zilawula ukuthuthukiswa kombala wesibhakabhaka ohlaza, obomvu nesibhakabhaka. Grey, hazel, nezinye izinhlanganisela kunzima ukubikezela
Ukubikezela Umbala Wamehlo
Nakuba izibikezelo mayelana neliso eliqondile libala amehlo omntanakho azoba nawo, kunezinye izimo ezinamandla ongazifunda ngazo. Isibonelo, uma bobabili amehlo omzali abomvu, kodwa omunye wabo unomzali ohlaza okwesibhakabhaka, ngakho-ke unamathuba amaningi okuthi amehlo omntanakho angase ahlale eluhlaza okwesibhakabhaka. Uma bobabili abazali banamehlo aluhlaza okwesibhakabhaka, khona-ke kukhona ithuba elihle lokuthola ukuthi amehlo omntanakho azohlala eluhlaza okwesibhakabhaka. Uma umzali oyedwa enamehlo aluhlaza okwesibhakabhaka, omunye amehlo, ingane yakho inamathuba angu-50 okushintsha umthunzi. Ngakolunye uhlangothi, abazali abaningi umzali oyedwa onamehlo aluhlaza okwesibhakabhaka kanti omunye unamehlo aluhlaza, izingane zingaqeda amehlo anombala obuluhlaza noma obuhlaza. Ungase ucabange ukuthi akukho nombala weso obonakala sengathi uyisakhi esiyinhloko ngakho-ke bahlanganisiwe okuphelele. Kodwa-ke, isayensi ibonisa ukuthi imibala yamehlo ayiveli njengenhlanganisela eqondile, kodwa kunama-pair of genees angakha amathuba amaningi.
Ososayensi basebenza ekuhlolweni okusekelwe ekuhlaziyweni kwe-DNA okungakwazi ukubikezela umbala weso.
Umbuzo uba-ke, "Ingabe kubalulekile ngempela uma nje ingane yethu iphilile?" Nokho, lokhu kungabalulekile ekuthuthukiseni izimo zofuzo ezingathinta impilo yezingane zakho.
Umthombo
U-Alfred Rosenbloom, Jr. noMeredith W. Morgan, Izimiso Nezenzo Zokuthiwa I-Optometry Yezingane. Inkampani kaJB Lippincott, 0-397-50917-0, 1990.