http://www.mcdonald.cam.ac.uk/genetics/mtDNAworld/one.html

The 13th slide is the one which best illustrates present findings.
Slides 1 - 12 show P. Forster's view of how each haplogroup arrived
at its present location. Some of these maps were also included and
described in the following article:

Phil. Trans. R. Soc. Lond. B (2004) 359, 255–264
Ice Ages and the mitochondrial DNA chronology
of human dispersals: a review
Peter Forster
Published online 13 January 2004

Gisele

[Echoing to t.o. and s.l., in hopes of triggering interesting discussion.]

On Thu, 12 Feb 2004 21:48:59 +0000, G Horvat wrote:

http://www.mcdonald.cam.ac.uk/genetics/mtDNAworld/one.html

The 13th slide is the one which best illustrates present findings.
Slides 1 - 12 show P. Forster's view of how each haplogroup arrived
at its present location. Some of these maps were also included and
described in the following article:

Bobby D. Bryant wrote:

[Echoing to t.o. and s.l., in hopes of triggering interesting
discussion.]

Troll. Trawling for ... what? troll food. Must be. Taking pity on the
poor troll, I give it a bowl of troll food. Here...

On Thu, 12 Feb 2004 21:48:59 +0000, G Horvat wrote:

http://www.mcdonald.cam.ac.uk/genetics/mtDNAworld/one.html

The 13th slide is the one which best illustrates present findings.
Slides 1 - 12 show P. Forster's view of how each haplogroup arrived
at its present location. Some of these maps were also included and
described in the following article:

There can be such a map if, and only if, you subscribe to the unsaid
thesis that evolution causes us (and cockroaches, and mice, and ...) to
evolve at the same rate, constant in space, constant in time. Now show
me a fish which is today as it was a hundred million years ago. Oh, a
coelacanth. Touché! Now show me a human being who is today as we were a
hundred million years ago... got one yet? never mind, keep on the good
work, I'll just wait. Even a hundred million years.

However, mitochondrial DNA is used because it is inherited from a single
parent (the mother) and is metabolically central (an so, much like in the
ontology recapitulates phylogeny models, implies less flexibility in the
selction).

http://www.mcdonald.cam.ac.uk/genetics/mtDNAworld/one.html

The 13th slide is the one which best illustrates present findings.
Slides 1 - 12 show P. Forster's view of how each haplogroup arrived
at its present location. Some of these maps were also included and
described in the following article:

Phil. Trans. R. Soc. Lond. B (2004) 359, 255-264
Ice Ages and the mitochondrial DNA chronology
of human dispersals: a review
Peter Forster
Published online 13 January 2004

Gisele

Actually, the necessary mensur for isn't what a phenotype looks like, but
rather the mutation rate of "junk" DNA (which shouldn't be subjected to
selective pressures that would effect the mutation rate).

If the mutation of "junk" DNA is constant, on average, over long periods
of time then the dating should work, even though selective pressures might
have caused the rest of the DNA (and thus the phenotype) to change much
more or less rapidly.

--
Bobby Bryant
Austin, Texas

"Jacques Guy" <jguy@alphalink.com.au> wrote in message
news:402DA49F.14CC@alphalink.com.au...
: galathaea wrote:
:
: > However, mitochondrial DNA is used because it is inherited from a
single
: > parent (the mother) and is metabolically central (an so, much like in
the
: > ontology recapitulates phylogeny models, implies less flexibility in
the
: > selction).
:
: Yes, I know that. Like the drunk on all fours.
: Comes a policeman.
:
: "Hello there, Sir, in a bit of trouble are we?"
: "I'm jusht looking for me housh keys."
: "Oh dear. And whereabouts have you lost them?"
: "On t'other shide of the shtreet"
: "Er... and shouldn't you be looking there?"
: "It'sh dark there. There'sh light here."
:
But he got his keys, didn't he?

"G Horvat" <g-horvat@shaw.ca> wrote in message
news:5esn20pj0il8orfb4r4fql4pip7ctgsa3j@4ax.com...

: http://www.mcdonald.cam.ac.uk/genetics/mtDNAworld/one.html
:
: The 13th slide is the one which best illustrates present findings.
: Slides 1 - 12 show P. Forster's view of how each haplogroup arrived
: at its present location. Some of these maps were also included and
: described in the following article:
:
: Phil. Trans. R. Soc. Lond. B (2004) 359, 255-264
: Ice Ages and the mitochondrial DNA chronology
: of human dispersals: a review
: Peter Forster
: Published online 13 January 2004
:
: Gisele

Nice one, Gisele, thanks.

Another visual from the same people:

http://www.mcdonald.cam.ac.uk/genetics/MtDNA_DistributionMap.gif

Bobby D. Bryant wrote:

[Echoing to t.o. and s.l., in hopes of triggering interesting
discussion.]

Troll. Trawling for ... what? troll food. Must be.
Taking pity on the poor troll, I give it a bowl of
troll food. Here...

On Thu, 12 Feb 2004 21:48:59 +0000, G Horvat wrote:

http://www.mcdonald.cam.ac.uk/genetics/mtDNAworld/one.html

The 13th slide is the one which best illustrates present findings.
Slides 1 - 12 show P. Forster's view of how each haplogroup arrived
at its present location. Some of these maps were also included and
described in the following article:

There can be such a map if, and only if, you subscribe to the
unsaid thesis that evolution causes us (and cockroaches, and
mice, and ...) to evolve at the same rate, constant in space,
constant in time. Now show me a fish which is today as it
was a hundred million years ago. Oh, a coelacanth. Touché!
Now show me a human being who is today as we were a
hundred million years ago... got one yet? never mind,
keep on the good work, I'll just wait. Even a hundred million
years.

On Fri, 13 Feb 2004 08:37:32 +0000 (UTC), Bobby D. Bryant wrote:

Actually, the necessary mensur for isn't what a phenotype looks like,
but rather the mutation rate of "junk" DNA (which shouldn't be
subjected to selective pressures that would effect the mutation rate).

If the mutation of "junk" DNA is constant, on average, over long
periods of time then the dating should work, even though selective
pressures might have caused the rest of the DNA (and thus the
phenotype) to change much more or less rapidly.

Except that "junk" DNA probably isn't. There appears to be evidence
that it's implicated in the action of epigenetic factors (such a
peptides acting at the surface of cells, admitting/blocking gene
activators.) Summary in recent SciAm (nov and dec 2003 IIRC.)

Bobby D. Bryant wrote:

[Echoing to t.o. and s.l., in hopes of triggering interesting discussion.]

Troll. Trawling for ... what? troll food. Must be.
Taking pity on the poor troll, I give it a bowl of
troll food. Here...

On Thu, 12 Feb 2004 21:48:59 +0000, G Horvat wrote:

http://www.mcdonald.cam.ac.uk/genetics/mtDNAworld/one.html

The 13th slide is the one which best illustrates present findings.
Slides 1 - 12 show P. Forster's view of how each haplogroup arrived
at its present location. Some of these maps were also included and
described in the following article:

There can be such a map if, and only if, you subscribe to the
unsaid thesis that evolution causes us (and cockroaches, and
mice, and ...) to evolve at the same rate, constant in space,
constant in time.

Now show me a fish which is today as it
was a hundred million years ago. Oh, a coelacanth.

Touché!
Now show me a human being who is today as we were a
hundred million years ago... got one yet? never mind,
keep on the good work, I'll just wait. Even a hundred million
years.