I have another question for chocolates, since we don't have a standard to go by. It appears that the chocolate gene changes the eyes from a dark brown to just brown. I was comparing the eyes of the blacks which are out of the chocolate black crossing with solid chocolates. It seems there is a small variation in eye color. which makes sense since the chocolate gene is a diluting gene. The chocolate gene not only has a diluting effect on the black feathers but also the legs and the eyes.
Something to consider are your birds E extended black or are they something else. I have lavenders with eyes as dark as a black in one strain of them.
These are bantams The Blacks and chocolate came from the same parent stock. I have a black split rooster with 2 chocolate hens. The blacks that hatch from this breeding appear to be E/E extended black, black extending down over the legs, and very dark eyes. although the bantam blacks appear to be Id/Id. while my large black orps are id+/id+. I can understand that the chocolate gene would dilute the dark legs that are from the extended black Id/Id. now if the legs were id+/id+ they most likely would be darker on the chocolate maybe? Most of the large black orpingtons are id+/id+ Now examining the chocolates that come from this breeding, the eyes of the chocolate are toned down.
Not all dilute genes effect eye color, the splash gene dosn't effect eye color or id+/id+ dark shanks
Lavender is autosomal linkage and so is the splash.
I'm going to look them over again. I understand that dark eyes are sex-link recessive. and the males have to carry this double dose to pass this on to the offspring, and the hen would have to carry one copy, which one copy is all she can carry since this is sex-link. my question: is chocolate sex link a powerful modifier??