tielfan wrote:
It isn't natural coloring though. The feathers normally contain black melanin pigment, and in the cinnamon mutation the last stage of the melanin production process fails so the pigment is brown instead of black. To our eyes it looks like different shades of grey, since we see the color filtered through the other physical material of the feather. But there's been a very fundamental change in the pigment color. The person who designed the calculator probably knows this too. They're using sophisticated technical names for the mutations that most breeders don't know, so they're obviously a genetic geek who's even deeper into this stuff than I am.
This is the point, where if my wife starts ranting like this, I just nod my head and agree
