El izingane umbala wamehlo ngemva kokuzalwa kwayo kungase kube nokungabaza. Iningi lezingane zaseCaucasia lizalwa nombala oluhlaza okwesibhakabhaka, kodwa linencazelo yalo, njengoba i-melamine iyingxenye isici esiyinhloko sokudala lo mbala. Kuze kube yilapho umfana noma intombazane ifinyelela izinyanga ezingu-12 noma ezingu-18 ubudala, umbala wamehlo awukwazi ukunqunywa.
Ukuze wazi umbala onembile ungalandela imihlahlandlela ethile esekelwe kuyo isibali esilinganisa ukulunga ngephesenti. Kodwa kuyoba ukulinganisa kuphela, njengoba ulwazi olunjalo lungafinyelelwa ngokuvumela isikhathi sidlule. Akumele umethembe umbala wamehlo lapho ezalwa kodwa ngokuhamba kwezinyanga uzobe ekhomba ukuthi uzosala ngamuphi umbala.
Kufanele ulinde isikhathi esingakanani ukuze uthole umbala wamehlo wengane?
Konke kuzoncika ku- melamine, into ekhona ekuzalweni nalokho izoxazulula i-tonality yesikhumba, amehlo ngisho nezinwele. Ngakho kufanele ulinde unyaka kanye nesikhathi esithe xaxa pukunquma idatha eqondile. Kunezimo lapho i-melamine ingenza khona kuze kube yiminyaka emithathu. Ezimweni eziningi, umbala wamehlo usuvele ube mnyama ngezinyanga eziyisithupha kuya kweziyisishiyagalombili ubudala ngakho-ke kuzoba umbala anamathela kuwo.
Ingabe umbala wamehlo ungabalwa?
Kungabalwa, kodwa kuphela kuzoba idatha enembile engahluleka. Akukho sibalo esiqondile, njengoba kuye kwaba nezimo ezingavamile lapho abazali babenamehlo ansundu futhi benengane enamehlo aluhlaza. Noma nabazali abanamehlo ansundu abanengane enamehlo ansundu. Kodwa lokhu kungenzeka kuphela uma ezinye abazali banesakhi sofuzo esinciphile, njengoba kukhona isihlobo esinalolufuzo nokwenza siluthole kubazukulu.
Kusuka lapha ungakha isibali esinembayo, kodwa njengoba sesibukezile, kuzoba ukunikeza isilinganiso. Uma abazali benamehlo ansundu kungase kube nengqondo ukuba nezingane ezinamehlo ansundu. Okufanayo kuya kubazali abanamehlo aluhlaza okwesibhakabhaka njengoba bengaba nezingane ezinamahlo aluhlaza. Kodwa kwenzekani lapho kunomehluko wombala phakathi kwabazali?
- Lapho omunye wabazali enakho amehlo ansundu namanye aluhlaza okwesibhakabhaka, amathuba awodwa 50% ithuba ukuba namehlo aluhlaza noma ansundu. Okunye okungenzeka kube ukuba namehlo aluhlaza.
- Lapho omunye wabazali ene- amehlo aluhlaza kanye namanye ansundu, amathuba ayoba 30% amehlo aluhlaza, elinye ithuba likhomba ku-a 50% onsundu kanye no-12% oluhlaza okwesibhakabhaka.
- Uma umzali oyedwa ene- amehlo aluhlaza kanye nokunye okuluhlaza, sinethuba lokuthi 50% eluhlaza okwesibhakabhaka kanti enye i-50% eluhlaza.
- Ngokuba amehlo ansundu kubazali bobabili kukhona nephesenti. Amathuba akhomba ku-a 75% ukuthi ingane inamehlo ansundu, 18% aluhlaza kanye no-6% aluhlaza okwesibhakabhaka.
Izingxenye eziningana kufanele zicatshangelwe. Lolu hlobo lokubala luyidatha kuphela yokunikeza umbala obonisayo, njengoba ungowakhe funda isimo somkhaya ukuze uqondanise izici ezihlukahlukene. Izikhathi eziningi umbala ungasinika isimanga esingaphezu kwesisodwa, ikakhulukazi uma izingane zinamehlo aluhlaza.
Umbala oluhlaza okwesibhakabhaka umbala omuhle, kodwa lokho kuzoncika ekuthandweni. Kumelwe siveze i-nuance yesibili, okuyinto umbala onsundu uzohlala ubusa kunoluhlaza okwesibhakabhaka. Ukuze unikeze umbala oqondile nomsulwa, imibala emibili evelele kufanele ifane futhi lokho kungaphazamisa ukuphetha okuluhlaza okwesibhakabhaka kweqiniso. Lo mbala udinga amandla ama-chromosomes 15 no-19, njengoba ungumbala ongalawuleki kangako, amathuba azoncishiswa.