Would it really matter?  I always thought that the Sanjiyan power was
spiritual not genetic (That's why Pai from 3x3 eyes needs the statue).

	Me too, that's why Jusenkyo didn't intrinsically affect the Sanjiyan 
nature, it only acted as a catalist to seal it away.  And when it wasn't sealed 
Jusenkyo didn't affect it at all.

Also do Nodoka and Ranma have alternate personalities for their Sanjiyan
forms?  (Pai seems to but you may be taking this in a different
direction.).

	Nodoka did, however I assume that the alternate personality takes time 
to develope so the only difference in Ranma is that when his Sanjiyan side is 
active his ego, and temper are amplified.