FAQ: is it possible that jade is not a basic mutation but a crossing-over between marbled and cinnamon?
No, it is not. For a start marbled is an autosomal mutation and cinnamon a Sex-Linked mutation. That means that these mutations are on different chromosomes. So a crossing-over between them is not possible.
Other question is if jade is a normal combination of cinnamon and marbled? So a cinnamon marbled green bird?
Again no, we examined the feathers and we are sure it has nothing to do with cinnamon. But if you are still doubting, you can easily test it yourself. If jade is a cinnamon marbled green you can combine a jade (cinnamon marbled) male with a green hen. Then the offspring should be cinnamon green/marbled hens and green/cinnamon/marbled males. Breeders who have these jades can confirm this is not the case.
So as far as we know, jade is a basic mutation.
