Originally Posted by DKRST
Hmmm. Without getting too deep into the angelfish genetics, and not diverting too far from Plumkin's original posted question (sorry): What influences the marbling and the "calico" color variations if black shows complete dominance? If no one wants to answer this, no sweat, I'll do some research on my end!
The dark, marble, gold marble, and gold traits are on the same locus. Marbling does not happen because of the dark allele, it was probably some mutation from the original wild allele? The marbling allele is recessive to the Dark allele but is completely dominant over gold marble and gold. Both the Dark alleles and the marble alleles are co-dominant to the wild allele.
EDIT: Did a little research and have confirmed that the Marbled allele is a mutation from the Wild allele....