The answer to that question is, yes, it has been done many times by numerous breeder including the originator. I have even done it. Not because I was trying to prove anything, but because I have gotten normals from clutches of condas that I really liked. Normals will not in any way make condas.

With co-dominant morphs, the normal offspring in the clutch do not carry the gene for that morph so it is impossible for them to pass it on.

Low espression examples of the morph will pass on the gene for the morph the same as high expression example will. When you breed 2 animals that carry one copy of the gene, you will get "supers". These animals have both copies of the gene and take on a totally different look from normals and condas. The "super condas" are patternless.