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

For all you know, so far, several of your ancestors may be carriers, perhaps even you. If you are, a blue eyed child is more likely. It’s also not redundantly coded, so any white person is one random mutation away from being a carrier. It is cross linked to skin color, because both involve melanin production, so if your family is black it’s much less likely.

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