Yep. Sorry about that I meant 59,000 and typed 59,000,000 after reading the paper you might understand why numbers became a blur. (I’ve been out of school way too long.)
The key point I was hinting at is that this article shows vastly different time frames for the statistical likely hood of a the occurence of a common ancestor for humans.
It seemed to me on a casual reading it is perhaps less certain that a “Most Recent Comon Ancestor” could not have existed before man was man than some have indicated.
Of particular interst was this paragraph from the article in question.
“By using a worldwide sample of 445 Y chromosomes typed at eight microsatellite loci, Pritchard
et al. (
15) estimated the expected time to the MRCA, denoted by
E**TMRCA], under a set of different mutation models. Their estimates ranged from 46,000 to 91,000 years B.P. under the different models, considerably less than those obtained by previous authors whose estimates were based on very small numbers of segregating sites (
5-9,
19), but consistent with the microsatellite-based estimates of Wilson and Balding (
14). The estimates of Pritchard
et al. (
15) of
E**TMRCA] are also much younger than those obtained at other loci, which include 143,000 years for mtDNA (
20), 535,000 years for a noncoding region at Xq13.3 (
21), 800,000 years for
http://www.pnas.org/math/12pt/normal/beta.gif-globin (
4), and 1,860,000 years for PDHA1 (
22).”
Chuck