yup. that's exactly what is bound to happen. in fact, i accidentally mixed melanogasters fand hydei, and they were fliers. the downside to genetically mutated creatures is that if you don't keep the same strains together, the resulting offspring will revert to it's original genetics.

example: red cherry shrimp (neocardinia sp.) in their wild form are brown. but through heavy selective breeding, breeders in germany were able to focus on the red pigmentation, which resulted in the RCS we currently have in the hobby. they did the same with yellow, blue and orange. but here is the kicker, if you were to breed yellows with reds, you would end up with about 80% brown. it's all about keeping the genetics stable.

i know it's not bug or frog related, but it's the best example i could come up with. hope that helps....lol