Yes, which is no longer an HRP at that point. It's a con/hrp hybrid that won't be marbled. Many generations you can get the marbling sure, but it's still be a mix, not an HRP.
If you want to marble and HRP, do it the same way they did with the convict. Get plat HRP's and breed a lot of them until you can pick out the mutants that don't fully express the plat gene and start line breeding them to fix the marbling. Then you could say you have a marbled HRP instead of a hybrid.
If you want to marble and HRP, do it the same way they did with the convict. Get plat HRP's and breed a lot of them until you can pick out the mutants that don't fully express the plat gene and start line breeding them to fix the marbling. Then you could say you have a marbled HRP instead of a hybrid.