Uh . . . nope. Well . . . it does have something to do with genetics . . . but not from space aliens.
Fortunately, we have something called . . . science . . . to help us understand what may have been going on with Akhenaten (and other members of the 18th dynasty).
An interesting 2009 technical article from the professional medical journal, Annals of Internal Medicine, addresses Akhenaten and others in his lineage. You can beam it up here.