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The barring gene is sexlinked, so males can have up to two copies of it, but females can only have one at most. So yes, in pure Barred Rocks, the males are double-factor barred, which is why they look paler than the females, from that extra dose of barring. All chicks that inherit barring will...

This looks more like a pea comb to me, are you sure you aren't getting the two confused? The gene for pea combs is partially dominant, with two copies making a smaller, neater comb and one copy making a taller, less neat comb. The rose comb gene is fully dominant, one or two copies expresses the...