Minecraft wiki entry for Panda, associated text: When two pandas breed, each one passes one of their genes to their children, who then randomly mix both obtained genes as their respective main and hidden genes. There is also a 1⁄32 chance for each gene of the baby to mutate into another gene. Mutations have different probabilities to mutate into the different genes, these probabilities can be found in the table underneath. These mutation probabilities also apply to spawned (not bred) pandas for their main and hidden genes.