Yintoni eya kuthiwa i-genetics?
Iingcali zesayensi ze-Genetics sele zibala ukuba kungenzeka ukuba yintoni umbala iliso eliza kuba nalo kumntwana, kwaye lirekhode ukujonga kwabo kwitheyibhile, echazwe ngezantsi:
Wonke umntu uyazi ukuba umbala wamehlo obalaseleyo okhoyo kwiplanethi unobundu. Ngoko ke, ukuba omnye wabazali unamehlo anobomvu, ngoko unako lokuba nomntwana onamehlo aluhlaza kakhulu. Nangona abanini bamabala aluhlaza banokuba nethuba lomntwana onamabala omdaka , nangona kunjalo, incinci.
Inomdla kakhulu yimbono yezinto eziphambili kunye nezigqithisileyo. Umntu ngamnye unesigqeba esithile sejethi. Ngamnye wabo uqulethe ulwazi oluxhomekeke kwimeko, lugxininiswe kwimeko, lunokuthi lugqithiswe okanye, ngokulandelanayo, lugqithise. Ngokwale ngqungquthela, unokufumana ukuba yeyiphi na amehlo umntwana ayenayo ngombala, imilo kunye nobude be-eyelashes. Ukufumana iinkcukacha ezithe vetshe, qwalasela iimpawu eziphambili kunye neziphambili kwitafile:
Kwakhona kunomdla ukuba uqaphele ukuba i-gene ehlukumezayo ingabonakali ngokungalindelekanga kwizizukulwana ezalandelayo, ngezinye izihlandlo ezikhokelela ekuphazamiseni ezinye izibini ezinezingane ezinombala wamehlo ahlukeneyo.
Umbala wamehlo ushintsha njani?
Qinisekisa ukuba yintoni amehlo umntwana ayenayo, xa ezalwa, ayiyi kusebenza. Zonke iintsana zizalwe ngamehlo amnyama. Kuyinto inqabileyo ukubona i-crumb kunye namnyama amnyama, phantse amnyama. Oku kufana nabantwana abanesikhumba esimnyama, apho kukho inani elikhulu le-melanin emzimbeni. Ukususela kwinyanga yesithandathu yobomi, amehlo e-crumb aqala ukutshintsha, kwaye umbala usekwe komntwana omnye ngonyaka, kunye nabanye babini okanye abathathu. Kutheni oku kwenzekayo kwiminyaka eyahlukileyo, kude kube ngoku izazinzulu azizange zinikeze inkcazelo ngokusemthethweni.
Kuyinto inqabile ukufumana iintsana ezinobuhlobo babo obuye bavuzwa ngamehlo angaqhelekanga: obumnyama obomvu okanye obomvu-kara-oluhlaza. Bobabini nakwabanye, bafumaneka kwihlabathi kwaye abayinto engafanelekiyo, kodwa abantu abanamehlo anjalo abangatshatanga.
Ukongezelela, ndifuna ukuqaphela ukuba iimvuthu ziyakushintsha umbala wamehlo amabini: i-traum ehambayo kunye nezifo zamehlo, ezinokuchaphazela utshintsho lombala kwi-iris.
I-100% yempendulo kumbuzo wemibala yamehlo afanele abe nayo kumntwana akayi kunikwa yona. Ngomncedi wezofuzo kuya kuba lula ukucinga ukuba kungenzeka ukuzalwa komntwana ngale nto okanye umbala, kwaye ukuba ubone oko kuya kuba yinyani, unokukwazi ukujonga kuyo kwiminyaka emibini okanye emithathu.