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| Symbol | Meaning | Example |
| - | Multiple Mutation | Cinnamon-Pearl (a cockatiel which exhibits both the Cinnamon and Pearl characteristics). |
| / | Split To | Normal Grey/Pearl (a cockatiel which looks like a normal grey but carries a Pearl gene, which may be passed on to future offspring). |
| & | Indicates multiple Split To | Normal Grey/Pearl&Pied (a cockatiel which looks like a normal grey but carries both Pearl and Pied genes, one or both of which may be passed on to future offspring). |
