Thanks for that breakdown. That's what I've gathered after doing a bit of research. Just like that thread on the questionable spider that the pro's were saying was a spider even though it barely looked like one. The gene is there or not. When I first started considering getting into pythons that polygenic thing had me all sorts of confused lol The one I'm still confused on would be the pastels with the introduction of a "lemon" pastel, I understand that its a NERD line but at the same time I don't know if breeding it into a lemon blast (or spider) like I have planned would produce more yellowing. If I had to guess based off of what my current understanding is then I would say it wouldn't but I don't know. I'll get the hang of this genetic thing one day I hope lol