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Don, The white under color only in the neck hackles is a new one on me. Birds can have white or silver under color because of certain gene combinations but the color covers the entire bird. When I refer to birds that are birchen based, there are two phenotypes or varieties either brown red...

The individuals I discussed black coppers with never said anything about having trouble with males. The biggest problem they had was the red stippling on the black back in females. I was talking about color and not conformation or other traits. What kind of color problems are you having with...

Quote: Genetics 101 The black copper marans should be birchen at the E locus. The copper color in the male and females is caused by a recessive sex linked gene called gold. Females will have one gold gene (hemizygous) and males will carry two gold genes (homozygous). Restrictors like dark...