Most of the pictures I see are of hatchlings, but I know often with age, those patterns can fade or brown out, etc.

1. Are some morphs/genes more prone to this dilution effect than others? For example, bumble bee comes to mind as one that can brown out. But a pure white BEL, I'd imagine is going to stay white.

2. Breeders would tell me that of course their particular high quality genes are more resistant to this effect. And, if I could see the adult I'd tend to believe them. Is it true that some lines are better at preserving the original beauty?