Hello, I'm just a bit confused regarding the differences in color pattern, and genetics, for the color "dark" as in dark cornish or asils, "partridge", as in rocks, cochins, etc, and" black copper", as in marans. These all seem pretty similar to me, how are they different, and how do they work genetically? A related question is this.. I have a rooster who is a mix of oegb, possibly with some japanese bantam thrown in, and his color seems to match "ginger red" the closest. I crossed him with a partridge rock bantam, and all the resulting roosters look exactly like partridge rock roosters, while the hens have the color and pattern of a black breasted red ( not wheaten!), instead of having partridge color. Anybody able to explain this? I assume it's some sort of sex linkage thing?