Gen Scan
A quick word here on how the gen-scan works.
Yes, if you are a mutant you would be born with those gene. This would mean the government would be scanning new born babies at birth and taking all the mutant ones. That is a little too dark and grim for my liking.
So, your mutant genes do not develop enough to be detected until puberty when most mutant powers manifest. You could be scanned one week and be fine and develop powers 2 weeks later. Everyone develops differently. Some people do not manifest powers or anything else until later in life. Late bloomers.
For the game, Eleyna did have her mutant gene and powers manifesting and 'conveniently' was not at any school gen scans. Others from the group did attend the scan and were fine. But since Eleyna did not show and records say she did, could someone have scanned positive and records say they didn't?
I actually like the current thoughts of Eleyna and Gabe on Coach Shelton. All I will say is that you are not entirely right (or wrong).
Something else that has not some up yet is Anomalous Humans. People who test positive to give birth to mutants but are not actually mutants. Everyone has an i.d. even kids. Their I.d. says if they are a normal human or an anomalous human. Mutants have no i.d. cards. At lest not legally.
Nuke