Originally Posted by Sparklee
I hadn't really paid much attention before to the fact that white (dom and rec) turn off pattern genes. Do you mean it specifically turns off Pg?
No.. Dominant white can turn any eumelanin(black feather pigment) in to white. pheomelanin(gold/silver feather pigments) are almost left untouched(Fading/diluting effect can be seen, example Red Pyle OEG), just look how Buff laced Wyandotte look, they are just gold laced wyandottes, basicaly their black lacing was turn into white lacing and their gold color was faded into buff by Dominant white.. that's how poweful is Dominant white, but not as powerful as the recessive white(c) gene, because any bird with two copies of recessive white is entirely white..
here in this pic you can see the effect of Dominant white on the same pattern.