Pure-blood

Pure-blood is the official term for mutant bloodlines who usually claim that they essentially have no Humans or Soul-borns in their family tree; although when trace back far enough, almost every family's bloodline has some no-superhuman ancestors. (For Example: "Reggie Terron is a pure-blood, but because of his late grandmother being a mortal, he is sometimes considered a half-blood, but because of his grandmother, Grace Terron, having latent mutant DNA, he is a full pure-blood.")

By 1996, the number of pure-blood bloodlines were diminishing. Most pure-blood bloodlines may always have half-blood, soul-borns and humans in their bloodlines, because of humans marrying into mutant families. Some mutant bloodlines have had the refusal of mutants marrying humans, so that the bloodlines could stay pure, yet if the DNA were strong enough in one mutant they would be considered a pure-blood, because of the fact that the humans marrying in the families, could have dormant X-Genes, not activated in their lives.