Madamwlf, I think the inheritance issue for your bird'swhite is not as simple as the 25/50/25 percent model. In your head you know this works for a single gene that is responsible for a single trait. In this case it's more complicated, many genes have a complex interdependence on each other. Often several genes are responsible for the expression of one characteristic, or the expression of one character is linked with another. My thoughts are: It's not that the bird is white versus black. It is expressing a quality that is not allowing color. I don't know enough to put percentage to this. Maybe at a graduate student level there is someone with enough research to know. I suspect it's lower than 1:2:1 or at least different.
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