have you ever seen a baby carrying 2 calico genes or 2 spider genes? you haven't because they don't live. they usually don't make it far enough into the incubation to even be seen. eggs go bad in clutches all the time even if there isn't a super. when it does happen because a super spider or calico is in them early on in incubation it's chalked up to be "just another bad egg." theres been discussions on it before with people that are much more knowledgable in genetics than i'll ever be.. let me see what i can find.