system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If I bred a red-eyed hedgehog and a blue-eyed hedgehog, I assume there'd be no chance of a purple-eyed offspring. But why not?

I had trouble looking up the exact information but I'm assuming that blue eyes are recessive in hedgehogs, and red/ruby are dominant? (I know for a fact they're both possible - mine has blue eyes). Assuming this is true, wouldn't 50% of the offspring end up with incomplete dominance, or a mix of blue and red eyes?
gpt
Because the genes doesn't mix that way. There's one gene for blue eyes and there's one gene for red eyes. When the baby is made the DNA from the parent's doesn't mix by just being added onto each other, some genes from the father is used and some from the mother is used. Therefore when you breed a red eyed hedgehog with a blue eyed one it's either one of them.