On Sat, 14 Feb 2004 17:41:26 +0000 (UTC), 
Rick  wrote:

> In Adam's Curse Brian Sykes says this:
> 
> "Over the last hundred generations, going back to well before the
> birth of Christ, the mitochondria you got from your mother had
> experienced only 2,400 potentially risky cell divisions. Compare that
> to your Y-chromosome, if you have one, which has been copied about
> five hundred thousand times over the same period."
> 
> This is one of the reasons why he claims that men are doomed in the
> next 100,000-200,000 years unless we evolve (naturally or articially)
> a new way of triggering men (instead of relying on the genes carried
> in the Y-chromosone).

Male mammals have been producing sperm for about 200 million years.
The Y chromosome seems to have done okay for at least that long. 
Why would anyone think that the males of one particular lineage (Homo 
sapiens) are doomed after surviving millions of years of evolution? 
There are roughly 5000 different species of mammals, are they all 
doomed? 



Larry Moran
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