Question, what would the outcome be if I bred lemon blue with my blue "mottled"? Curious question, I'm bored, & just got up.I get the there may be an egg from a purebred thing.
Even in eggs from a barnyard mix of eggs. If someone has a pure hen and a pure rooster among the mix of breeds they're collecting eggs from.
BUT when you're hatching eggs from a batch like that you can never be positive a chick that looks pure is so its best to call it a mix because odds are slim it isn't.