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Please read the notes bellow!
BUDGIEGENEX is a Java applet, where you can set different genetic mutations of the budgerigar and see how these mutations alters the outlook of the budgie. The radio buttons on the right side represents mutations. Each mutation is represented with two buttons, for the two chromosomes.
You can find a color/pattern guide about how to create some common color variants here.
Your comments are very welcome.
Some resorce I've been used: