To confuse matters further, not all genies - the so-called demon geneticists - actually (are able to) manipulate demonic 'genes'. Genies generally only change shells (bodies). The distinction does not mean much to anyone but a genie.
When a demon comes into existence, certain properties or 'statistics' are determined. These can be thought of as a bit like genes, except that a demon has no parents as such, and no DNA.
Some properties:
Use the {{demongenetics}} tag, after a horizontal rule, at the end of articles about demonic genetics.