User blog comment:Rise against/Superboy Should he slowly gain more of his kryptonian powers?/@comment-175.39.42.170-20120609031603/@comment-4026406-20120609035141

Meta-Gene =/= Mutant X-Gene (from Marvel, of course.)

The X-Gene is random mutation that gives superpowers. DC comics closest version of that is the Meta-Gene, but "metahumans" are not as numerous as Marvel's mutants. DC uses the term to basically describe any human with superpowers, regardless of how or why. For example, the Flash is a metahuman, even though he got his powers from a chemical experiment; basically, because he had the metagene, he was able to survive that experiment better than the next guy could, but the experiment is actually the source of his powers, if that makes sense. The metagene is usually not the actual source of the powers.