At the heart of breeding, it is the mechanism to mix DNAs of Porian parents into the DNA of their child. The DNA of each Porian consists of 64 genes. So far, only 28 of them are known by the smartest Porian mages. These 28 genes determine 7 parts of a Porian (e.g. head, face, body, arm, leg, tail, and accessory). Each part is derived from 4 genes, 1 dominant and 3 recessive.