Stargate SG1 question

I’ve been watching SG1 on DVD and I’m now in the middle of season eight. Apparently O’Neill has the Ancient gene. In what episode did they actually discover this? Or was it covered in Stargate:Atlantis (which I haven’t started watching yet)?

If I recall, it’s the Season 7 finale.

ETA: Yeah.

Hmm. Yeah I saw that one. I guess I was hoping they would put some dialogue in later episodes like, “Oh, we found out why Jack was so good with the Ancient stuff. His DNA shows he has a weird gene we will now designate as the Ancient gene” or somesuch. I guess I’m too picky. :cool: