Barred Rock Polish x WCB Polish?

[airynn]

Okay I am hoping someone can help. I have a roo that is a cross between a barred rock hen and a buff laced polish roo. He is a barred roo. I was thinking of breeding him back to a WCB Polish hen. Would the chicks be 50% black and 25% barred and 25% buff/black? I tried to do a genetics chart but I came up with 50/50 black barred and buff barred. I think the offspring would look 100% polish, but its just a guess.
(not my photo but my guy looks just like this with a bigger crest and bigger barring/whiter)

If anyone can explain the genetics of it, please help! I know a Welsh Harlequin duck crossed with a welsh cross will produce welsh babies- though the sex linkage would not be there.

 

[RoostersAreAwesome]

It would help if you could post a picture of your rooster. Even a similar cross might have some differences that can influence the looks of his offspring.