Yes but it isn't a birth mark. My sister has blue eyes (from our mom) and has a brown blob in one of her eyes from my dad. It's either Ur other parents eye color in u or on of ur parents genotype was green dominant brown recessive meaning u could have brown eyes even if neither of ur parents do.
Is it normal to have a birthmark in my eye?
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Yes but it isn't a birth mark. My sister has blue eyes (from our mom) and has a brown blob in one of her eyes from my dad. It's either Ur other parents eye color in u or on of ur parents genotype was green dominant brown recessive meaning u could have brown eyes even if neither of ur parents do.