Mr. Laser Beam wrote:
And the QuchHa' aren't fusions, as we understand it - they're still pure blooded Klingons. Just altered with human DNA. That doesn't change their parentage or anything like that.
Well, considering any Klignons we see in TOS would be decendents of those originally affected, they would be "fusions" in that sense, with Human DNA being inherrited from their parents, making them no longer pure blooded.