I think that breeding for certain traits in morphs that are recessive, dominant, co-dominant, etc, is different from breeding normals for certain "normal" traits, which I think that you are referring to. It is my understanding that normal breeding is completely random, and normals carry all kinds of genes; so you could breed 2 really gold BPs and get nothing but greens and blacks just as likely as you'd get nothing but golden schemed babies. With normals, its basically all up in the air.