Queen had a white primary feather that persisted after her adult molt, so the white came from her. He didn't have the feather as a cockerel, but it showed up as he molted this year. This was his first adult molt. I will be putting him with Duchess (Duke's sister from Harvey). I'm not sure it would be wise to cross full brother-sister (Prince x Malika) because of the white. I haven't noticed any white on Malika but I haven't handled her since her molt.
Ah so he did not has a white as a cockerel .the white just appeared after his first molt .so he is a carrier of the gene @ late age . bad but is a good new too .he is not a full parasitic white carrier ,if mated to hens free from any white ,he will throw a lot progeny without it ,some will have it late .
what we see now after his first molt .is a true pattern .
chooks man