I picked up a nice spider ball python female today that is pretty dark and the guy I bought her off of said she may have the chocolate gene in her. But he didn't know the lineage from who he bought her from. I've looked at a few pictures online and not to sure she is a chocolate spider. So I guess what I'm wondering is what makes a chocolate spider a chocolate spider?

I apologize for the dark photos I have horrible lighting in my house. I will hopefully get some better pictures in the daylight tomorrow so hopefully these will do for now.