Mama looks like a Gamefowl cross perhaps. The last pics of the chick are definitely a cockerel. Pox needs a full body shot photo. Your rescued mama carries genes that makes it easy to sex chicks by color once they're feathered out enough. If Pox truly does have more brown, light brown markings all over instead of black and reddish, she's a gal.
ETA - spoke too soon, that's a definite girl