aye I thought so mate, I kept budgies for a good few years ( not show type, I just bred for colours ) and know a little about genetics, I,m no expert either though,
to be honest I like normal coloured birds the most but you do get some cracking mutations, particularly parakeets ( parrot lets, indian ringnecks etc , I also kept penguin zebras for a few years
My mates giving up the birds so I,ve got my name on his breeding cages, I,m going to start up again ( don,t tell the wife lol ) but I can,t make my mind up between Javas, canarys, parrot finches, Gouldians, British etc etc etc lol