E Locus Chick Down
I've already talked about the e locus in chickens, now lets talk chicks.
Sometimes, the e base of a chicken can be hard to determine as an adult, and while I am one of the worst people to ask to identify the color of a chick, it may provide a clue as to which extension gene it has. I used pictures from My Pet Chicken because their photos were consistently clear with the same sort of background.
Duckwing (e+) chicks have chipmunk striping. (Picture from My Pet Chicken.)
Extended Black (E) chicks are black with white bellies, like penguins. Sometimes they have more black than this. (Picture from My Pet Chicken.)
Birchen (E^R) chicks typically have white chins, wings, and vents, but sometimes can have more or less white. (Picture from My Pet Chicken.)
Wheaten (e^Wh) chicks are the stereotypical yellow people expect to see in chicks. Fortunately, with the first wing feathers you will realize if that yellow chick is white or wheaten. (Picture from My Pet Chicken.)
Partridge chicks are brown and ruddy with stripes on their backs and speckling on their heads. (Picture from My Pet Chicken.)