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You've got it BC Gal!
The reason I commented, is because time and time again I read where people buy birds thinking they are "carrying" a trait that they want to instill in their line of birds - only to find out later that they have purchased birds that won't let them go to where they want to get.
The simple way to think of it, is that recessive genes (usually written with small letters in their notation) CAN be "carried" hidden within the genetic make-up of the bird. When two carriers with the same hidden gene are bred together the seemingly miraculous "throwback" occurs. Dominant genes (usually notated with capital letters) can NOT be "carried" within the bird. If the bird has the dominant gene - it shows it.
In human genetics, thats why brown-eyed parents can have a blue-eyed kid (blue being a recessive to brown) because each brown-eyed parent carried the recessive blue-eyed gene hidden, within their own genetic make up. Two blue eyed parents can't have a brown eyed kid - because of the dominance of the brown-eyed gene won't allow it to be carried and hidden. If the brown-eyed gene is there (even in a single copy) - then the person will have brown eyes.
I was once teaching this lesson in class, and had a student start crying and leave the class. This girl's blue-eyed parents had hidden the fact that they had adopted this brown-eyed girl. My lesson on genetics (and Punnet Squares) provided the girl with the truth that had been withheld from her for so many years. It was sad - but in the end it turned out well.
Everyone unsure of genetics should always look up whether a given gene is dominant or recessive and know and remember - if it's a dominant gene - it can't be "carried" - no matter what the parents look like.