Light sussex gender & rose combs

[crazy chook]

I bought pure breed light sussex fertile eggs and hatched them. I have 3 that have rose combs and I am not sure if they are roosters or hens? They are about 7 weeks old.

Not a very good photo but it is the only one I have at the moment.

Please let me know if you think it may be pure breed or if light Sussex are supposed to have rose combs and if it is male or female.
Thanks

 

[nzpouter]

single comb only... and those 3... looks like roos..