5 doctors weighed in:

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

5 doctors weighed in
Dr. Richard Bensinger
Ophthalmology
4 doctors agree

In brief: 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.

In brief: 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.
Dr. Richard Bensinger
Dr. Richard Bensinger
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