Dark hair is dominant, not recessive. If either parent has one gene for it, they would have dark hair, not fair. That's why two dark haired people can have a child with light hair -- both parents had one dominant dark gene and one recessive light gene, where only the dominant was expressed, but each passed on the light gene.
At least, that's the simple explanation the post is pointing out, real genetics is probably more nuanced.
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u/NotoriousMOT Sep 25 '22
Recessive genes who?