Eli5: is it possible for a single grandparent to pass on their eye colour to their grandchild?

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Me and my partner both have brown eyes…
My side of the family have all brown eyes so I’m assuming we don’t have the blue eye gene.
My partners parents: his dads side have all brown eyes but his mother and aunts and grandfather have blue eyes. So my husband must be a carrier.
Will my brown eyed genes dominate his blue eye genes or is it possible for a blue eyed baby?
It’s so interesting how it works

In: Biology

10 Answers

Anonymous 0 Comments

it is possible, while genes for brown (and green) are dominant, you usually also carry the recessive information for blue eyes in your DNA.

if you google “eye colour genetics chart” for example you find a couple of images showing the likelyhood of a baby having a specific eye color dependant on their parents eye colors.

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