Based on research focusing on Genghis Khan's genetic legacy, approximately 16 million men alive in 2003 carried his DNA.
While it's impossible to say definitively how much of the entire world population (including women) is related to Khan, the reference indicates a significant number of men share a common ancestor with him. Determining the exact percentage of the world population related to Khan would require more comprehensive genetic studies across diverse populations. Given that there are approximately 8 billion people on earth today, 16 million men carrying his DNA translates to a relatively small percentage of the total world population.
