Today’s unusual prevalence of this chromosomal variant is most likely the result of Genghis Khan’s military success, the investigators say. It’s even possible that just Genghis Khan and his sons may have had enough offspring to account for the chromosome’s unusually high prevalence today, says Tyler-Smith. Noting that geneticists have analyzed DNA from Neanderthal skeletons, Tyler-Smith suggests that the tomb’s discovery could lead to a direct comparison of Genghis Khan’s Y chromosome with those of modern men.