[thechat] Journey of Man

[Pauline Caldwell]

On Wednesday, February 5, 2003, at 03:23 , Erika Meyer wrote:

> The DNA thing patterns are where I get confused also... but anyway,
> he's tracking patterns on the y chromosome.  Women don't have a y
> chromosome.  He says that men give their y chromosome to their sons
> in a relatively intact state.  So that enables him to track patterns
> on the y chromosome.
>
>
There's mitochondrial DNA, it's only passed on by the mother. There was
a BBC Television Horizon programme on super-volcanoes, broadcast a
couple of weeks ago, that described the technique of tracking
mitochondrial DNA as a means of estimating global population just after
the Toba eruption, 74,000 years ago.

http://www.google.com/search?hl=en&safe=off&q=Bottleneck+and+%22Mitochondrial+
DNA%22

Pauline

Pauline's Views of France: http://www.cubica.co.uk/pauline/