Wizards and witches are any humans in possession of magical abilities. While most are proud of their magical heritage, some, like Rose Cotton, only desire to be normal, and find wizarding blood a most shameful thing.
Gene Pool Edit
Wizards all carry the wizard gene, which typically shows up in offspring.
If a wizard mates with a normal human, giant, or an alien, their children will usually inherit magical abilities. The child of a wizard and witch who have all magical family are pureblood wizards, the child of a wizard and giant, normal human, alien, or witch with not all magical family are half-blood wizards, and the child of non-wizard parents are called Muggle-born wizards. A child with no magical power born into a wizarding family is calle a Squib.
Wizards can only die by getting their balls smashed.