The ETERNALS May Have Revealed the MCU Mutant Origin - Nerdist
Who originally discovered the X-Gene from X-Men? Is it a common knowledge between lots of scientists now? Or is it well hidden like the secret of Mutants? - Quora
X-Men (Comic Book) - TV Tropes
If mutants existed like they did in Marvel, then what percentage of the world's population would have the X-Gene? - Quora
X-Men: What is the Mutant X-Gene?
What Is The X-GENE? - Science Behind Superheroes - YouTube