Lapho ekushintsheni umbala amehlo ezinganeni?

Lapho uqala ukuthatha ingane yakho ezandleni zakho, uyazi ukuthi kungakanani obakhathalelayo ke. Njalo ingane - sithandwa futhi zaziswe futhi efanayo yibo bobabili abazali. Yilokho eyodwa kuphela ngaphezulu? Ukuze ukwazi ngokuqinisekile kuyoba kungenzeka kuphela emva kwesikhathi esithize. Kusukela ngenyanga ubudala, umntwana iqala ukushintsha ukuma kwekhala, amehlo, izingebhezi. wawabona ngemva konyaka kamuva, yini umbala izinwele uzobe icaciswe ukuma ezindlebeni, umbala ushintsho iso in izinsana.

amehlo umbala

Abazali abaningi banesithakazelo umbuzo lapho ekushintsheni umbala amehlo ezinganeni. Lokhu ukulindela lihlotshaniswa unesifiso sokuthola lokho ezisifundisa, ubani uthanda pipsqueak. Iqiniso liwukuthi ukufana - yigama. Ingane eneminyaka engaphansi kweminyaka emine kungaba izikhathi ezimbalwa ngaphezulu ukushintsha umbala izinwele noma amehlo. Lokhu kungenxa inani melanin emzimbeni. Akunakwenzeka ukusho ngokuthe ngqó lapho ekushintsheni umbala amehlo ezinganeni. Le nqubo ingase zenzeka njalo noma kanye kuphela. Ososayensi kulo nyaka olwisana kakade nge tesimongcondvo, kodwa awukwazi ngokuthé ngqo ukuthi kungani lokhu kwenzeka. Izazi zezakhi zofuzo bathi izinqubo ezinjalo ezihlobene nokusebenzelana lithathelwe. Iqiniso lokuthi ingane ine genotype esungulwe okuhambisa ke ngokulinganayo kusuka umama nobaba. Ngokuphathelene phenotype, ezingeni layo uphansi ngenxa yokungabi nokuhlangenwe nakho. Esikhathini inqubo yentuthuko kanye lithathelwe kumntwana kukhona ushintsho ezinye izakhi zofuzo, esikhubazayo ukuze evelele. Ngakho kukhona ushintsho yemvelo evumela ukuthi umntwana ukuze alungele izimo zokuphila, lapho uzophila. It kubonakala ngesimo izinguquko lesikhumba umbala iris iso, izinwele, njll

izibalo

Ngokuvamile abazali kubuzwa lo mbuzo: "Yeka ukuthi kungakanani siyashintsha wamehlo wengane?" Ngokwezibalo, ezingaphezu kuka-70% izingane ziyashintsha umbala amehlo eneminyaka engu-iminyaka. Le nqubo kungenzeka ngaphambili, ngezinye izikhathi kamuva. Ezimweni ezingavamile kakhulu, ingane ingase ishintshe umbala kufika ku eneminyaka emine ubudala. Kukhona amacala lapho umntwana ngonyaka ne blue eyes, kanti phakathi konyaka ke nsundu. Ngezinye izikhathi umbala iris (iso ulwelwesi) iba njalo nge engu-izinyanga ezintathu. Konke kuncike izici ngamunye umzimba abasha. Ngakho umbuzo lapho ekushintsheni umbala, lamehlo abantwana, akukho impendulo eyodwa ecacile.

izici umzimba

Ngokuvamile umbala iris akukaqinisekwa kuze kuphele izinyanga ezintathu noma ezine. Ngaphezu kwalokho, kuba sobala uma ingane brown amehlo. izingane Blue uneso zisesikhathini ngonyaka ukuba umbala nanini, ngoba inani melanin kungaphasi of brown okotshani. Zonke izingane zibuthuntu grey wamehlo. Kuyinto eyinqaba kuphela ezinganeni. Njengoba zikhula kukhona ukuthuthukiswa ukwakheka kombala futhi iso umbala kancane kancane uba ngokuqiniseka. Ngakho-ke, umbuzo wokuthi ekushintsheni umbala, lamehlo abantwana, ongeke uphenduleke ngokuqondile.

amaqiniso ezithakazelisayo

Izinsana njalo amehlo dim. Lokhu kungenxa lithathelwe yabo: e utero azange abe ukubukela ngenxa yokuntula ukukhanya. Kodwa ngemva kokuzalwa kwengane inyanga iba ejwayele xaxa ukukhanya sosuku. Kuyinto uhlobo imfihlakalo bemvelo. Nazi ezinye amaqiniso ethakazelisayo iris ezinganeni:

1. Eye umbala - uhlukile! Hhayi nje ngoba abantu basendulo babekholelwa iso eshaweni izibuko. impregnation ngamunye uhlukile, like zeminwe.
2. Umbala ezivamile iris - ensundu ne-eziyivelakancane - oluhlaza. Kwamanye amazwe, abantu amehlo aluhlaza , bakhuleka.
3. bangaphansi kwamaphesenti angu-enye yezingane babe heterochromia - ezahlukene amehlo anemibala. Ngokuvamile lokhu kwenzeka ngo-amawele.
4. Izazi zezakhi zofuzo bakholelwa ukuthi umbala wamehlo idluliselwa ngokuvumelana nomthetho Mendel sika. Ngakho, uma abazali nangebala iris, nenzalo ifa nombala ofanayo. Uma abalingani babe amehlo ezahlukene, umntwana uyoba umthunzi nendawo.