Genghis Con?

Science, technology, and life.
Feb. 26 2009 10:47 AM

Genghis Con?

Not many guys are brave enough to take on Genghis Khan. But then, Genghis never met Hank Greely. Greely, a law professor at Stanford , does a lot of work in genetics and brain science. And he's tired of hearing the tale about Genghis single-handedly (well, "handedly" might not be the precise term) populating the Eastern world. According to the version I quoted yesterday , "8% of males throughout the former lands of the Mongol empire carry the Y chromosome of Genghis Khan."

/blogs/humannature/2009/02/26/genghis_con/jcr:content/body/slate_image


Not so fast, says Greely:

Advertisement

Here are the facts, as far as we know them.  One Y chromosome haplotype is widespread over areas that the Mongols ruled. Genghis ruled the Mongols and had, at least, the opportunity to father many sons, some of whom had similar opportunities. End of facts.

Maybe that's Genghis's Y chromosome, but, as we have no DNA from Genghis (his tomb was hidden) and no certain knowledge of any of his living direct line male descendants, we don't know what his Y chromosome looked like.

Maybe it's the Y chromosome of Genghis's handsome troubadour, or vicious chief of staff, or someone else. We don't know.

And even if it is Genghis's Y chromosome, it's possible none of those now carrying it descended from him. His brothers, paternal uncles, paternal male cousins, etc., all had the same Y chromosome. In fact, if he came from a clan with a lot of males, it probably helped him become the leader. One of the few actual studies showed that 35% of Mongols have this Y chromosome type—is Genghis the cause or the result of that statistic?  Who knows?

Do I think there's a good chance that this is Genghis's Y chromosome? Sure, probably as good a chance as anyone and better than most. But how good is that? Who knows. But it's a good story and so it has spread like flu—in part being spread by genetic genealogy companies that are looking for good stories to use that might help convince people to buy their services. 

For a more formal version of Greely's critique, see his chapter, "Genetic Genealogy," in Revisiting Race in a Genomic Age , published last year.

Oh, and if you're planning to sue Genghis' estate for your share of the inheritance, don't even think of offering your Y chromosome as evidence. I have a pretty good idea whom the estate will be calling as an expert witness.

Will Saletan writes about politics, science, technology, and other stuff for Slate. He’s the author of Bearing Right.

TODAY IN SLATE

Foreigners

More Than Scottish Pride

Scotland’s referendum isn’t about nationalism. It’s about a system that failed, and a new generation looking to take a chance on itself. 

What Charles Barkley Gets Wrong About Corporal Punishment and Black Culture

Why Greenland’s “Dark Snow” Should Worry You

If You’re Outraged by the NFL, Follow This Satirical Blowhard on Twitter

The Best Way to Organize Your Fridge

Politics

The GOP’s Focus on Fake Problems

Why candidates like Scott Walker are building campaigns on drug tests for the poor and voter ID laws.

Sports Nut

Giving Up on Goodell

How the NFL lost the trust of its most loyal reporters.

Is It Worth Paying Full Price for the iPhone 6 to Keep Your Unlimited Data Plan? We Crunch the Numbers.

Farewell! Emily Bazelon on What She Will Miss About Slate.

  News & Politics
Weigel
Sept. 16 2014 7:03 PM Kansas Secretary of State Loses Battle to Protect Senator From Tough Race
  Business
Moneybox
Sept. 16 2014 4:16 PM The iPhone 6 Marks a Fresh Chance for Wireless Carriers to Kill Your Unlimited Data
  Life
The Eye
Sept. 16 2014 12:20 PM These Outdoor Cat Shelters Have More Style Than the Average Home
  Double X
The XX Factor
Sept. 15 2014 3:31 PM My Year As an Abortion Doula
  Slate Plus
Slate Plus Video
Sept. 16 2014 2:06 PM A Farewell From Emily Bazelon The former senior editor talks about her very first Slate pitch and says goodbye to the magazine.
  Arts
Brow Beat
Sept. 16 2014 6:23 PM Bryan Cranston Reenacts Baseball’s Best Moments to Promote the Upcoming Postseason
  Technology
Future Tense
Sept. 16 2014 6:40 PM This iPhone 6 Feature Will Change Weather Forecasting
  Health & Science
Science
Sept. 16 2014 4:09 PM It’s All Connected What links creativity, conspiracy theories, and delusions? A phenomenon called apophenia.
  Sports
Sports Nut
Sept. 15 2014 9:05 PM Giving Up on Goodell How the NFL lost the trust of its most loyal reporters.