What happens when you breed a Cinny to a Black Pastel? Do you get a 1/4 chance of a Solid black snake? And if you bred that solid black snake to a normal, would you get 1/2 Cinny and 1/2 Black Pastel?

Is it like breeding a Lesser to a Butter, where you still get a 1/4 chance of a solid white snake, but if you breed it to a normal you get Lessers and Butters?