I would go along with Sue (Darkbrowneggs) pretty well spot on.
I remember watching a programme on this a while back, quite interesting.
A hen can show all symptoms of a cockerel including full plumage, spurs, wattles. They can behave as a cockerel, presenting food etc to the hens and lowering their wings slightly, although they say that this can appear amateurish.
Some can lay eggs, but this is very much dependant on the amount of change or testosterone, the more they look like a cockerel the less unlikely they will be to lay. They cannot reproduce as a cockerel i.e. fertilise a hen.
Show us a pic if you can, love to see your heshe.
Wonder how they taste