Originally Posted by SoldierBoy
cant you also get 25% chance of getting the color of the grandparents of either parent
I think it depends on whether or not the color/mutation in question is a dominant or recessive. For a gene to be dominant, it can show the trait and also carry a second one (for example, a yellow bird can be yellow, yet split to blue). Since a white base (blue) bird is a recessive trait, I don't think it can "carry" the dominant yellow base along with it without being visibly yellow, if that makes sense.
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