Welcome to Harry Potter Theory. Today, we'll be discussing exactly how the genetics of witches and wizards work, with a focus on where the heck SQUIBS come from.

If you're a fan of Harry Potter and the works of fantasy fiction in general, you've likely asked yourself the question: Where does magic come from? In some universes it would seem that magic can be acquired or learned. But in others - like the wizarding world of Harry Potter - magic is explained as more of a natural talent or "gift" that a person is born with.-

But how exactly does that magic get passed down from generation to generation? Why is it that some Muggles end up with magical abilities - while other children born into wizarding families are unable to perform even the simplest of spells?