I posted for the first time a few days ago... have read a few more pages of this thread since then, but am still only on page 256.
I have a potentially ignorant question about the genetics of BCMs.
I have read up somewhat on chicken genetics, so am not totally clueless, but several times I have read on this thread about BCMs producing Gold, Copper and Mahogany Hackle/Saddle.
Is everyone 100% certain that this is not due to Wheaten influence and the corresponding absence of homozygous mahogany?
We know that Wheaten has been introduced to BCM in the past, and standard wheaten genetics (at least on the calculator, couldn't find it on the Aussie site) does NOT carry Mahogany. So while the Wheaten genotype hides under the dominant ER birchen, it also could introduce lack of Mahogany.
Is it at all possible that the "ideal" copper color is the heterozygous Mh/mh? I've tried to find if the Mh allele is incompletely dominant, don't know for certain. Breeding to this perfect copper would create the same dilemma as the Andalusian Blue and Dark Cuckoo English Marans Roos - at least half of what you breed won't be right unless you ALWAYS breed complementary birds, e.g. too much mahogany Mh/Mh with too little mh/mh.
It's possible that this is a moot point if it has been proven that the prominent lines in the US are all Mh/Mh and the difference is just in the phenotypic expression.
Maybe you all already discussed this in the 200 plus pages I haven't read yet.
Am I the only one curious about this?