Ok, I know others on here can answer in a clearer way, but I will go ahead anyway. Andalusian blue is an incomplete dominant, and self blue is a recessive. When you breed self blue to self blue, you ALWAYS get self blue and nothing else. Both birds must carry a copy of the self blue gene for the offspring to show self blue. If you cross to any other color you will get that color, for instance black. You breed a self blue to a black and they will all be black, but the offspring will be split for self blue, meaning you can cross those back with a self blue and get self blue. Now, andalusian blue is a tad different. You breed Blue to Blue, and you get Blue, Black and Splash. A blue is nothing more than a black that has had a dilutor gene added to it. A blue has 1 copy of the dilutor gene, being a black bird that has been diluted ONCE, a splash is carrying two copies of the dilutor gene, being a black bird that has been diluted twice. Now, that is clear as mud, lol.....
Blue x Blue = 50% Blue, 25% Black, 25% Splash
Blue x Black = 50% Blue, 50% Black
Blue x Splash = 50% Blue, 50% Splash
Black x Splash = 100% blue
You get 100% blue from a Black x Splash cross as every one of the offspring will recieve 1 copy of the dilutor gene, from the splash, as it is carrying 2 genes but can only pass on 1.
Blue x Blue = 50% Blue, 25% Black, 25% Splash
Blue x Black = 50% Blue, 50% Black
Blue x Splash = 50% Blue, 50% Splash
Black x Splash = 100% blue
You get 100% blue from a Black x Splash cross as every one of the offspring will recieve 1 copy of the dilutor gene, from the splash, as it is carrying 2 genes but can only pass on 1.
