by a 'tuft' do you mean 'crest'? If so, there are crested cream legbars, which should have a crest, and plain (gold or silver) legbars, which I think don't.
That apart, the gene for crest is autosomal incomplete dominant, which I think means a pure line can throw an uncrested individual every now and then; but you should research this yourself, as I struggle with chicken genetics and my grasp of these things is insecure.
That apart, the gene for crest is autosomal incomplete dominant, which I think means a pure line can throw an uncrested individual every now and then; but you should research this yourself, as I struggle with chicken genetics and my grasp of these things is insecure.