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Archiver > GENEALOGY-DNA > 2005-11 > 1131851479


From: "Jim Lawson" <>
Subject: RE: [DNA] Haplotype Q and Autosomes
Date: Sat, 12 Nov 2005 22:12:11 -0500
In-Reply-To: <25d.e12e13.30a768c2@aol.com>


Hi Ann, thanks, this list is awesome. I can sit down and look at a diagram
and make sense of it but when I focus on a question, it all goes out the
window. A one track mind on a narrow gauge railroad. Biology was a course I
had always avoided and now it shows. I really have learned so much from this
list and the various websites that are associated with it. I also have the
bad habit of being so focused on the objective that I forget to make sure
the details are in the painting so that it will make sense.
Since I saw David's post showing what the percentages of Q, Q3, C and so
forth, It appears that the Na Dene had about the highest percentage of Q and
these are mostly Western Native Americans. If my Q is from an Eastern
migration and my g-g-grandfather was born on the East Coast (possibly
Charleston, SC) in 1790, one would wonder (based on the odds) how his
haplotype got to Charleston. I have two ideas of how this might have
happened, my Q came from a Western migration (Norse) or from the Caribbean.
I don't know if there was much Q down there or not and it may be impossible
to tell since there are so few Natives left it that area. Charleston was
settled in 1690 by the English who stopped off in Barbados for a year before
finally getting to Charleston. It was not be unusual for a plantation owner
to pick up slaves or servants down there. The practice was to bring slaves
from Barbados to the mainland and to take Natives from the mainland to the
islands. This was to take them out of their element otherwise they could
just slip into the forest and be home.
The fact that my g-g-grandfather was educated enough to obtain a teachers
certificate in at least two states speaks to that. But I feel that is an
important clue.
Anyway, you can see how one day I lean one way then the next day, the other.

Thanks to you and this great list for all the help you have been, Jim Lawson



-----Original Message-----
From: [mailto:]
Sent: Saturday, November 12, 2005 10:48 AM
To:
Subject: Re: [DNA] Haplotype Q and Autosomes

In a message dated 11/11/05 8:29:20 PM Pacific Standard Time,
writes:

> Thanks David, David, Doug and others for the helpful information. I
> realized
> after I sent my post that mtDNA should have been xDNA (is that the way to
> write it?). I knew mtDNA is passed through the female and so tripped on
it.

In your first message, you wrote "I would assume that the shape of my teeth
would be determined by autosomes and not by the yDNA markers for Haplotype Q

and that these autosomes could come from either mtDNA or yDNA. Or both."

Actually, the X chromosome is not an autosome, either. Autosomes are the 22
chromosomes that *always* come in pairs (numbered 1 to 22, roughly in order
of
decreasing size), and X and Y are called the sex chromosomes. That's a bit
confusing, too, since it's a gene on the Y chromosome that is responsible
for
determining gender. The Y has very few genes at all (27 by one way of
counting),
mostly concerned with sperm production. The X chromosome has over a thousand

genes, most of them not concerned with sex-specific traits. The "complete"
sequencing and annotation of the X was just announced earlier this year:

http://www.sanger.ac.uk/Info/Press/2005/050316.shtml

Since SMGF includes X STRs in their research program, and since Thomas Krahn

has already made some tests available, I think it's important for everyone
to
understand how the X is inherited. There are diagrams in my book "Trace Your

Roots with DNA" on page 27. You can use the "Search Inside the Book" feature
at
Amazon (no charge, but you must have a credit card on file) and use "weasel
word" as the search term.

http://www.amazon.com/exec/obidos/ASIN/1594860068/

Now I've gone far astray from your original query! I typed in incisors at
OMIM (Online Mendelian Inheritance in Man), since I knew that shovel-shaped
incisors are associated with Native American ancestry. It does not appear
that this
trait has been located to any chromosome.

http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=147400

As a matter of fact, if you type in "teeth" as a search term, there are very

few dental traits where the gene has been identified. (If a gene has been
identified, a listing would show something like 4q21.3, meaning that it has
been
narrowed down to a region on chromosome #4.)

Ann Turner


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