With anything that is genetic,the higher the filial number,the greater the chance of isolating a homozygous example,and/or discovering the true nature of any given mutant.it seems pastel has just become a huge adjective stewpot for anything slightly above pure brown? if you notice,every single hypo produced now is a "pastel" with no real suggestion of any linear continuity,or previous track record at all? just my take on it,at the rate everything's being lumped into the pot,eventually "pastel" will simply mean that it didn't come from a black boa... *lol* as far as I can imagine,I can't think of anything I'd be interested in working past F3? if it's a form of dominance,third gen. should yeild the desired result,if it's recessive you should have an entire litter of homozygous examples to out cross from...why go to F4 with anything???
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