Wasn't really sure where to post this as it has to do with genetics but not bp genetics. It could be any animal or plant. In my case it's about chickens. So here is my question to all of the geneticist out there. After crossing 2 or more breeds of the same species and going thru the process of F1, F2 , and so on. Once the subject breeds true, how many generations before its considered a breed and not a mutt?