I've seen several of your posts in the past and can't agree with who you believe are the parents of some so with that and the extreme mixture of color/pattern genes you have going on the outcome of most would be too far mixed to have a clue.
That said your white Cochin is recessive white. Every...
She is basically the same color/pattern as a female black sex link.
You're correct a lot of BSL use a red rooster as you did. Pretty much same genes from fathers side.
With BSL the female is barred which is passed to her sons but not her daughters so males are barred and females aren't. Hence...
Naw they're not heterozygous dominate white because they breed true.
I've put mottling from MF on other things and it looks and acts the same.
I've crossed exchequer and it didn't come out the same as any other mottled.
Anyways I won't get into that like I said I don't completely understand it.
Lol.
Wish I knew. I do not have exchequer figured out.
Everyone says its mottled but I have some experience with mottled and exchequer and it isn't just mottling.
Imo it is mottled plus something else.
I just happened to have hatched a couple chicks from some black Xs barred breeding that look...
With whats listed it would probably be best to cross self blue to MF then continue to cross back to self blue. The lavender is going to be an issue since it is recessive and can be carried in the black birds for forever sight unseen.
MF has nothing to offer except the mottling gene so once you...
It won't be anywhere near that simple.
I think the OP is having issues getting a black bird since they are also wanting to make a solid black D'Uccle.
If they do have a EE black bird and breed it to a MF then breed it back to a MF that could give them the two doses of mottling but that's it...
I answered your other thread but seeing this one I'm curious.
Do you know the genetics behind these varieties?
If not that needs to be your first step. Understanding what genetics will be needed to get to the colors/patterns you're wanting and then the genetics of what you have available to see...
A mixed breed.
Would resemble a Birchen for the most part.
How did you get the conclusion of duckwing?
The Birchen is E^R/E^R and partridge is e^b/e^b (I believe) so chicks would be Birchen/partridge E^R/e^b.
Duckwing is e+/e+ so Birchen Xs partridge will never make duckwing.
Some females will be silver and some won't.
Some females will be barred and some won't.
Some males will be barred and some won't.
That cross will not only produce gold males and silver females either.
That male carries silver and gold so he can pass on either to his offspring.
Basically he is...
When I was working with the silver/gold I was crossing gold duckwing and silver duckwing.
The silver/gold cockerels looked like silver duckwing but got a dingy yellowish color in the hackles, and saddle feathers.
It was pretty easy to tell who was silver who was gold and who was silver/gold.
Whatever the rooster is is what he will produce no matter if he's bred to silver or gold hens.
If he is silver/silver he produces all silver pullets.
If he is gold/gold he produces all gold pullets
If he is silver/gold he produces 1/2 silver pullets And half gold pullets
There could be a lot of different genes hiding. Any recessive genes can hind. And being extended black which is dominate can hide many things.
I have a trio of blue and black silkies. Every time I hatched their eggs id get as many white chicks as BBS combined. The adults all carried recessive...
Its not barred so couldnt be from the barred hen. The splash hen would have to pass a blue gene to its offspring. If the chick is blue its hers. If its black it cant be hers.
If its black then it has to be from the lavender hen.
Thats assuming the brahma is the dad.
Thats the easy answer. Your...
It doesnt have to be purebred but it has to have two copies of the barring gene to throw all barred chicks. One copy will give 1/2 barred and 1/2 non barred.
I assume when you say purebred youre meaning that it has to have the two copies of barring.