What happens when you cross dominant white with black?

[Cheekychook12]

I’ve heard many things and I’m curious what I’ll actually get, I have a cockerel who (I think) is dominant white with a few barred feathers and some pure black pullets, what would I get off I crossed them?
And what would I get if I crossed him with the silvery hen pictured below?

 

[AinaWGSD]

Assuming he's homozygous for white, white chicks with black (or black barred) spots. Don't know enough about birchen to guess what exactly that cross would produce, but probably similar.

 

[Egg Snatcher]

You’ll get paint chicks. @NatJ may know some more.

 

[Cheekychook12]

You’ll get paint chicks. @NatJ may know some more.

Ooh exciting! I can’t wait, those are one of my favourite colours
When I put it into the genetics calculator though it just said they’d be white

 

[Cynthia12]

You could actually come up with blue too. Like you said..genetics.

 

[Cheekychook12]

You could actually come up with blue too. Like you said..genetics.

Interesting
Would a blue birchen be possible?

 

[Cynthia12]

Again..genetics..possibly.

 

[Amer]

Are you sure he's dominant white barred? Cochins/Pekins are normally recessive white.
Could I see a picture of him in better lighting?

 

[Cheekychook12]

Are you sure he's dominant white barred? Cochins are normally recessive white.
Could I see a picture of him in better lighting?

He’s not a Cochin, he’s a Pekin bantam, and no I’m not sure, he hatched yellow white with a grey spot
I’ll try, I know I have some decent ones but he’s a bit younger in those pics
He also has weird silkie like feathers on one side

 

[Amer]

He’s not a Cochin, he’s a Pekin bantam, and no I’m not sure, he hatched yellow white with a grey spot
I’ll try, I know I have some decent ones but he’s a bit younger in those pics
He also has weird silkie like feathers on one side

That's really weird.
I think he might be a mosaic, just both parts have the same color but different feather textures. Do Silkied Pekins exist? Silkied Cochin bantams (the equivalent to Pekins everywhere except UK and Australia) exist but that doesn't mean they were imported.
Recessive white can occasionally have colored feathers pop through but I've never seen a fully colored feather. Still, Pekin bantams are never dominant white so I expect he is Recessive White nonetheless, unless he has Silkie ancestry. (Silkied Cochins don't have Silkie ancestry, it popped up spontaneously.)
I expect his chicks would probably be black barred but really any pattern could be hiding under that white.