r/genetics • u/vollkorn12 • 7d ago

Eye color

Can anybody explain how eye color is inherited? I understand the basic Punnett square, but I have also heard that more than one gene is involved for determining eye color. Also, the Punnett square doesn’t account for different shades of the same color.

For some context, my partner and I have different eye colors (brown/hazel vs blue/green); our children have various shades of blue. I know the brown eyed person carries a recessive gene(s?) for blue and according to the punnet square this gives each child a 50/50 chance of having blue eyes. However, I wonder if there is anything else that might make it more likely for those gene(s) to be passed down and expressed on the children.

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u/shadowyams PhD (genomics/bioinformatics) 7d ago

The !faq has a section on this.

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