10wk Dark Brahmas and Jersey Giants M or F?

[Mystariea]

We have 2 Dark Brahmas. They were supposed to be pullets but I think we may have gotten one of each. They are 10 weeks old. What do you think?
Also.. (last 2 photos) we have 4 black jersey giants. All supposed to be pullets. One however has a much larger comb and waddle. They are also 10weeks old.

 

[The Happster]

The first Dark Brahma is a boy.
The second Dark Brahma is a girl.
The first Jersey Giant is a boy.
The second Jersey Giant is a girl.