How many generations do you think it will take for me to achieve a Brahma x Wyandotte mix in hope of achieving a brahma with wyandotte pattern?
When you cross the two breeds, the chicks of the first generation will not have the pattern or the body type you want.
If you cross those chicks back to a Wyandotte, you might get some Wyandotte-patterned chicks in the second generation. Being 3/4 Wyandotte, they will not look much like Brahmas.
If you cross the first-generation chicks back to a Brahma, you might get some chickens that look like Brahmas (body shape, foot feathers, comb type). But they will not have the color pattern you want.
The only possible way to get what you want in the second generation is by mating the first-generation chicks to each other. But you will get lots of variations, most of them the wrong color pattern or the wrong body type or wrong in both. You could hatch several hundred or more, and might be able to pick out a few that are close to right, but the odds are still really bad. For example, Wyandottes have rose combs and Brahmas have pea combs. When you cross them, you get walnut combs. If you breed the walnut combed crossbreds together, only about 1/16 of the chicks will have the correct Brahma comb type (pea comb). So 15/16 of the chicks you hatch are already wrong, just because of their combs, before you consider ANY other traits!
I predict that you will have to hatch many hundreds of chicks, over 2 or more generations, to make much progress.
So if you want Brahmas with laced feathers (pattern common on Wyandottes), it will be much faster and probably much cheaper to just buy some.
But if you want to try it yourself anyway, you should be prepared to eat lots of chickens (ones that are not right), and work on it for quite a lot of years while. You will probably learn a lot about chickens by trying it, and will see lots of interesting chickens along the way.
It's not a fast project, but it might be a fun or satisfying one
