Hmmm, you have me stumped. Of course for all I know one of them might be a yellowbelly or something. So one of them is het for something. Now just to figure out if the Normal is right or the het axanthic is right. I'm trying to think of recessive genes that have white. Albino....axanthic...pied.... Could it be a yellowbelly X normal. That would be het for something with white (ivory) I love guessing games!