Vernita has brown eyes and her husband has green eyes. Their eyes differ in color mostly due to the
A) thickness of their corneas.
B) number of blood vessels in the cornea.
C) amount of melanin in the iris.
D) number of blood vessels in the retina.

Question

Quizplus · Accepted Answer

The color of one's eyes is primarily determined by the amount of melanin in the iris, the colored part of the eye. Brown eyes have more melanin than green or blue eyes, which is why Vernita has brown eyes and her husband has green eyes. The other options, such as the thickness of the corneas or the number of blood vessels in the retina, do not play as significant of a role in determining eye color.

Vernita Has Brown Eyes and Her Husband Has Green Eyes