Unlike more common eye colors like brown, which is the dominant color and makes up about 80% of the world's population, or blue and green, gray eyes require a confluence of complex genetic ...

Medically reviewed by Andrew Greenberg, MD Eye color genetics is complex, with multiple genes from each parent determining a ...

Breeding male: blue-gray above, including most of head and back. Crown has a black line at the forecrown that extends along the sides of crown; white eye ring contrasts with gray face. Wings ...