• Question: why are eyes different colours and why are they two differnt colours sometimes

    Asked by Uma to Andy, Diana, James, Mary Jane, Wil on 10 Mar 2017.
    • Photo: Wilhelmiina Toivo

      Wilhelmiina Toivo answered on 10 Mar 2017:

      I’m not really a biology expert, so you would probably get a better answer from somebody else 🙂 As far as I know, we have different eye colors because we have different amounts of melanin (it’s a pigment found in the front part of the iris). Darker eyes usually have more melanin and lighter eyes less. So when your eyes are of two different colours (this is called Heterochromia in the eye), they have different amount of melanin each. Scientist are not entirely sure why this happens and there are many reasons for it, for example having multiple genotypes in your cells, disease, or injury

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