someone already went over the genetics but I will try. Jump in and correct me if I am wrong...
The barred pattern is sex linked, so the gray chick which might have a light spot on its head? should turn barred, and be male. The darker one, should be female and not change to barred. If you breed your hen to a barred male, all babies will be barred. I am really excited to hear about your hen. I want to trade eggs with another barred bearded hen. I am going to try to go to the APA nationals this week to see if I can get my hands on a spectacular show quality barred roo... wish me luck. I have a clutch of my hen's first eggs under a silkie right now, hoping for the best. I will post pics asap when some hatch.