|"Are you a wizard or not?"
The title of this article is conjectural. Although it is based on canonical information, the actual name is conjecture and may be supplanted at any time by additional information released from canonical sources. If this occurs, please move this page to the appropriate title.
It is requested that this article, or a section of this article, be expanded. Please help the Harry Potter Wiki by expanding this article to give more complete coverage of its subject.
The magic gene is a portion of human DNA that determines whether a person will have magical abilities. Those people born with the gene active are witches and wizards, while those who are not are Muggles or Squibs.
The magic gene is dominant, and any child born to a wizarding family will have some degree of magical ability, or at least magical awareness. Squibs, while unable to use magic, are still able to function within the wizarding world to a limited degree. The descendants of squibs who instead integrate into the muggle world and marry will usually be muggles, although the magic gene occasionally resurfaces in later generations and produces a Muggle-born witch or wizard.
Behind the scenes
- J.K. Rowling stated that she had considered having Dudley Dursley have a magical child in the epilogue, and see them off to Hogwarts at Platform 9¾ at the same time as Harry and his family. She decided against this, however, stating that any latent wizarding genes would never survive contact with Uncle Vernon's DNA.
- According to J.K. Rowling, nobody knows where magic comes from.
- Despite the magic gene being dominant, that doesn't explain Squibs or Muggle-borns, or how muggle borns manifest their powers the same way as Half-bloods or Pure-bloods. It is therefore possible that magic is controlled by more than one gene or is only partially dominant.