Q
Why do we have different eye colors?
A
Expert Answer
Eye color is determined by melanin amount and distribution in the iris, controlled by multiple genes (OCA2, HERC2 primary). Brown eyes have more melanin; blue eyes have less. It's a polygenic trait with complex inheritance patterns. Green and hazel involve intermediate amounts with light scattering effects.
Key Insight
Eye color is determined by melanin amount and distribution in the iris, controlled by multiple genes (OCA2, HERC2 primary).
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