Ive been hoping someone answers your question soon, :idk myself. I think that the white is a dominate trait that usually carries on as a visual, but i Have Not studied genetics Nearly enough to tell you anything. You might do better to post your question in the genetics part of the fourm? There are lots of chicken people who study these things so they can breed to the SOP or so that they can produce sex linked chicks, OR socthey can produce blues... Genetics are interesting, and complicated, be prepared to take notes!
I just hatched 10 bresse so very excited to have a new project on the road