Yeah, that's pretty much the direction this thread ended up sending my train of thought. Like bluefall said, that would explain why we never see them (the other two purposes I can see the Yellows most likely putting them to - expendable cannon fodder in wars, and genetically similar guinea pigs for their self improvement techniques - would pretty much guarantee we see them in some Dominator stories), and it certainly fits in with the Dom's culture. And explain how all those things no self-respecting Yellow Dominator would stoop to doing get done.
So, I withdraw my complaint about her colour...between the three of us, it's been successfully wanked away. >_>