Yes, they do. But the boys comb and wattles develop faster.
Comb development and barring.
Before he/she is even 8 weeks, if it's a boy, he'll probably have some very red wattles and a comb. If it's a pullet she probably won't be red until much closer to laying age.
For the barring the boys...
They look more like 4ish weeks old right now, a bit young to sex and know gender for sure.
But I think the Barred Rock possibly could be a male, other two look like females as of now.
Hard to know what color pattern your Wyandotte is till it's fully feathered.