One thing I hate about the "Phoenix Five", is it proves you don't need to have an "affinity" for the PF. Jean just "happened" to be a high level tp who the PF bonded to, but ANYONE (Or any mutant) can host it.
Dumb.
So, who wins?
__________________ What CDTM believes;
Never let anyone else define you. Don't be a jerk just to be a jerk, but if you are expressing your true inner feelings and beliefs, or at least trying to express that inner child, and everyone gets pissed off about it, never NEVER apologize for it. Let them think what they want, let them define you in their narrow little minds while they suppress every last piece of them just to keep a friend that never liked them for themselves in the first place.
The Grey bloodline are direct decendents of Alpha the first mutants. With Alpha the first Mutant, being this all powerful mutant. Inheriting its power is manifesting the Phoenix Force.
shutting off Jeans X-Gene effectively neutralizes he Cosmic powers, confirming the relation of the Phoenix Force tied to her mutation.