And then there are the interactions between the genes....and the "modifier" genes. For example, Welsh harlequins are dusky and harlequin phase. Normally, with plain dusky, there is no rings around the neck of males, or blue wing speculum on either sex (think Kahki Campbell). However, when combined with homozygous harlequin the neck ring on males actually is enhanced and circles the entire neck, and the wing speculum is enhanced as well on both sexes (one of my favorite features of harlequins!)
Whose to say that extended black does not respond differently in the presence of homozygous dusky versus heterozygous dusky, versus wild type?
I have a drake that is heterozygous for harlequin and for dusky. According to the rules he should look like a regular grey, since both harlequin and dusky are recessive. But he doesn't. He shows some signs of his dusky half. I have had other drakes that are heterozygous for dusky, but have not had the harlequin gene, and they look like regular greys.
Whose to say that extended black does not respond differently in the presence of homozygous dusky versus heterozygous dusky, versus wild type?
I have a drake that is heterozygous for harlequin and for dusky. According to the rules he should look like a regular grey, since both harlequin and dusky are recessive. But he doesn't. He shows some signs of his dusky half. I have had other drakes that are heterozygous for dusky, but have not had the harlequin gene, and they look like regular greys.
