Muggle-born is the term given to a witch or wizard who is born to two non-magical parents. Their magical abilities do not seem to be at all affected by their Muggle parentage. In fact, many Muggle-borns have been among the most talented witches and wizards of their time, such as Lily Evans and Hermione Granger.
Subsequently, one may also ask, how is Hermione a witch when her parents are Muggles?
Hermione was a witch. She was a muggleborn, which is a wizard or witch born to non-magical or muggle parents. They get their magical genes though a squib in the family. A squib is a non-magical child born to magical parents.
One may also ask, is Hermione a Muggle or Mudblood? Hermione Granger is frequently referred to as a “mudblood” by prejudiced. There are some Muggle-borns who refuse to allow the term to be degrading to them.
Beside above, how can Muggles have a wizard child?
If this is the case, a single random mutation in the gene could fix it for two muggle parents, or two muggles could have a child who gets healthy versions of the gene from one or more parents (the genes do seem to be dominant, since Muggle + Wizard invariably ends up with a Squib or a witch/wizard).
Is Hermione a witch or a wizard?
The most prominent Muggle-born in the Harry Potter series is Hermione Granger, who had two Muggles of unspecified names as parents. A witch or wizard with all magical heritage is called a pure-blood.