I really don't like the title, it looks like a confusing linkbait. Following the unofficial extended guidelines, I suggest the subtitle that is much better: "Did sexual reproduction evolve to keep up with mitochondrial mutation? "

That link lies in the fact that mitochondria are not just cellular batteries. Billions of years ago they were actually independent organisms. They are an example of how the human body is not entirely “human.”

and (quoting someone else):

“Until recently, science has basically ignored the fact that we are all walking around with two genomes in every cell,” Dowling says, “that of our own nuclear genome, and that of the mitochondria.”