Re:1 in 200 of men alive today are direct descendants of Gen...
by salemh on Sunday August 07, 2011 @12:14AM
(#2855737)
Hrm, this may help you / someone else get closer. This also relates to the 2,000 - 5,000 year subject:
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.62....
from Google Scholar: http://scholar.google.com/scholar?hl=en&q=all+living+hum...
Haven't been able to find it again, though.