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

Yes. Eye color is determined by a number (5 or more) of genes that you can still be carrying even if not all are expressed. So your eyes might be brown because there are active, your kids might be blue because all others express in them.

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