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Archiver > GENBRIT > 2006-01 > 1137449552


From: "Rob" <>
Subject: Re: Most recent common ancestors
Date: Mon, 16 Jan 2006 22:12:32 -0000
References: <1137338990.456458.231910@f14g2000cwb.googlegroups.com> <mo4ms15t5bs77ev0ds8bhs690882gdmb15@4ax.com> <dqf5c5$rl4$1@newsg1.svr.pol.co.uk> <dqff7p$afe$1@eeyore.INS.cwru.edu> <dqg9ct$6ok$1@newsg2.svr.pol.co.uk> <dqgfrv$hsa$1@eeyore.INS.cwru.edu>


Taf the body found at Stonehenge was suggested to be of Swiss descent
because he was buried with a Swiss made bow and had the arms of an archer
that was uncommon at that time in Britain. All the analysis could tell was
that he was of European birth

Rob
"Todd A. Farmerie" <> wrote in message
news:dqgfrv$hsa$1@eeyore.INS.cwru.edu...
> Rob wrote:
>> "Todd A. Farmerie" <> wrote in message
>> news:dqff7p$afe$1@eeyore.INS.cwru.edu...
>>> They do not show that he was a descendant, they show that he belonged to
>>> the same maternal lineage.
>> Actually no it shows they had the same paternal lineage because they
>> didn't carry out MtA sequencing as far as I know. After all the Y
>> chromosome is the only one that doesn't become altered birth after birth.
>
> But it _was_ mtDNA. At the time, in the late 90s, mtDNA (a thousand or
> more copies per cell) was almost always used when working with ancient
> samples because the techniques were not well enough refined to effectively
> sample nuclear DNA such as the Y chromosome (one copy per cell) with any
> sort of reliability (and without being overwhelmed by contamination,
> particularly with samples handed around for a century).
>
>
>>> Anyhow this misses the point. As has already been pointed out,
>>> virtually all North American 'natives' probably also descend from
>>> post-Columbus Euros, even if only through a single
>>> great-great-great-great-great-great-(etc)-grandfather. The fact that
>>> they are members of tribes that predate Columbus does not negate this.
>>> In other words, there is nothing to stop the schoolteacher in question
>>> from being descended from BOTH the Cheddar man AND Ghengis Khan.
>>
>> Thats very argumentative with little or no evidenc eto back it up. It is
>> based on a weak set of guidlines.
>
> Huh? I was pointing out that a Devon school teacher having the genetic
> markers of a 9000 year old man need not invalidate him sharing a more
> recent common ancestor with all of humanity, as you seemed to be
> suggesting. It is rather self-evident, given the number of possible
> ancestors the man would have had 100 generations ago - his connection to
> Cheddar man being known to represent just one of these 2^100 (roughly
> 1,000,000,000,000,000,000,000,000,000,000) ancestral lines.
> Cultural/population stability and low-level gene flow are two different
> issues, particularly given the increasing evidence for extensive networks
> of stone-age interaction (for example the skeleton found at Stonehenge
> being of, what was it, Swiss extraction, and one of the recently reported
> Irish bog-men having continental hair gel).
>
> taf


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