First off, my belated apologies to Allyn for my snarky reaction to his entirely correct criticism of the medical science in Gods of Night.
The fact is, medicine is not my forte, and genetics is even less so. In retrospect, I see that I made a scientific mistake; even more irksome to me, I made a dramatic mistake.
Only after reading the logical refutations of Troi's medical crisis and now Allyn's followup, I realize that instead of making this a strictly medical/scientific issue, I should have made it an ethical issue that examined the gray areas related to the Federation's aversion to genetic engineering on already-existing organisms.
C'est la vie. And, might I add .... darn.