In the Marvel comic books we know that Celestials intervened and created the "X-Gene," do we know exactly how? And with what technology? Or is it never stated? Are non-Celestials able to create the X-Gene?
I am aware significant characters such as The Stranger and Apocalypse have been able to tamper with already developed mutant genomes, does that mean other mutants can potentially be created by non-Celestials? (I know that the writers are not genetic experts so many things contradict themselves.)