finchbreeder wrote:Sounds good. Accept as a bit of a geneticist you must know that recessive genes do not have to turn up anytime in under 10 years.

Though they should show up on a 50/50 or 25/75 depending on the type basis. But try flipping a coin and tell me that you get heads and tails evenly like you should. Good luck what you are trying to achieve is a good thing, just playing devils advocate.
LML
That's why I'm mating them with birds that ARE displaying the recessive traits to see if they are split at all

in a seasons worth of breeding I should well and truly be able to identify which birds are split to what with appropriate pairings. Will also have a lot of split birds to sell off, or may even keep some mutations

will never like them nearly as much though!!!