All three of those black and white birds are cockerels. They are carrying in the silver gene and it is expressed in certain ways on males and females, so I am pretty certain they are males.
Pips, thank you. I was pretty sure of that, which is why I am excited about the coloring of the last one. I wanted at least one pullet from that cross. I know that all my BR I crossed with the same roo the males barred and the females are black. All the RIR and PR I crossed with him are colored like him, males and females alike. So, I got alot of males, lol, which is ok. had planned on processing males, keeping hens for eggs. I have become fascinated with the outcome of colors, tho and have been trying to learn more in that area.