Register for an account


Enter your name and email address below.

Your email address is used to log in and will not be shared or sold. Read our privacy policy.


Website access code

Enter your access code into the form field below.

If you are a Zinio, Nook, Kindle, Apple, or Google Play subscriber, you can enter your website access code to gain subscriber access. Your website access code is located in the upper right corner of the Table of Contents page of your digital edition.

Planet Earth


Gene ExpressionBy Razib KhanFebruary 13, 2012 4:03 AM


Sign up for our email newsletter for the latest science news

My post, 1 in 200 men direct descendants of Genghis Khan, is linked up somewhere almost every week. Why is it so popular? No idea. But one thing that has come to mind: we've come a long way in since the early 2000s in assembling databases of human scientific genealogies. Soon enough a substantial proportion of the males in the human race will have their Y chromosomes typed. What proportion of these individuals are going to be part of a "star-shaped phylogeny," implying a radiation from a single individual relatively recently in the past? My own suspicion is a great deal. The Khan lineage is simply a relatively recent one as these things go. How did R1a1 come to be so widespread?

    3 Free Articles Left

    Want it all? Get unlimited access when you subscribe.


    Already a subscriber? Register or Log In

    Want unlimited access?

    Subscribe today and save 70%


    Already a subscriber? Register or Log In