A member asked:

Sister has brown eyes, other two siblings have blue eyes. what gene is dominent?

A doctor has provided 1 answer

Brown over blur: The inheritance of eye color is somewhat complex but when it comes to brown v. blue --- brown is dominant over blue. In your family, Mom and Dad probably have brown eyes but carry one gene for brown and one for blue. There is a 25% chance of a child in this mix with blur eyes. All other combinations will be brown. It is a matter of statistics.

Answered 5/31/2017

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