Well Zidane was his prized Genome from memory and the one that he believed would destory the world and cause all the chaos that Kuja ended up doing and he was Kuja's upgrade and Kuja lasted about 25 years. If Zidane and Kuja were super powerful and special Genome's and Kuja lasted about 25 years then I'm guessing that the original Genome's lasted to about 10- 5 years; which isn't long at all.

The Black Mages lasted to anything to 1 day to Vivi's 6 or 8 years and they were made under Kuja's creation and they were more powerful than the normal, usual Genome that Garland created. So to be honest... it's anybody's guess; but I assume it's anything to about 1- 5 years.

Goodness knows how long Zidane is going to last for. If he was Kuja's upgrade I'm guessing he'll either live until live until he's 35 live or be a odd superhuman and outlive Garnet, Stiener, Eiko and everybody and live until he's 300 or 400 years old.


Though since Zidane managed to save the race from Terra they'll hopefully breed and gain a longer lifespan or just die out completely, same with the Black Mages.