The black dot would indicate a sexlinked cockerel. Mine were splash marans over Cream legbar and had a lot of variation but some looked like that and all of the girls had the stripe even though the colors varied. I had some that were splash marans over sussex and they all were black with white...
The males are black with white barring. They are now 4 weeks and their feathers are coming in good. The girls are some black, some blue, and 1 is black and white. They all have feathered feet and legs. The dad was splash marans.