Zvitema takangwaririra vanhu vose vakabatanidzwa chimwe chinhu

Pane pfungwa kuti rwebhuruu takangwaririra vanhu vane tateguru. Kwavari ndiko European yekare, ane zera riri vatanhatu gumi zviuru zvemakore. Akanga awana chairo nemagene mutation, nokuti paiva nomumwe mufananidzo pamusoro Iris.

Chii chinobatanidza mukuru rwebhuruu takangwaririra

Pakutanga, vanhu vose vakanga shava takangwaririra. Zvisinei, kuvabereki kuchinja, kusanganisira avo chokuita OCA2 Gene, zvakaita kuti kwaita rinoreva siyana shava. Pachishandiswa mashoko aya, vaongorori vakanga vachiedza kuwana anokonzera ruvara, iro basa yebhuruu maziso OCA2 Gene, asi hazvina zvazvakabatsira.

masayendisiti ichangobva akaita zvakawanikwa: mhaka rwebhuruu takangwaririra vanhu riri HERC2 pedyo Gene kunotouraya. Izvozvo OCA2 zviratidzo anosarudza uwandu rwe-melanin (brown ruvara), hapana zvainoita dziberekane ari Iris kuti rwebhuruu. Masayendisiti anodavira kuti mutation ichi pakutanga kwakaitika apo paiva vakawanda yokutama kwevanhu kubva Africa kuEurope. Possible kukarakadza kuti vanhu vane zvitema maziso - zvizvarwa vokuEurope vaigara dzekare.

pfungwa iyi kunosimbiswa ndechokuti ose yebhuruu takangwaririra vanhu zvakafanana mutation. It haritauri unhu kuti kuzitateguru.

Vanochera matongo vakawana marangwanda iri North of Spain, uyo akanga meso mutema. Age marangwanda - makore 7000. Sezvingatarisirwa, maziso akanga akawanikwa, asi masero kuongorora kwakaratidza kuti pane mutation kuti uye dzakapendwa Iris mutema.