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'MITOCHONDRIAL
DNA'
- FOR BEGINNERS
By
Ian Logan
www.ianlogan.co.uk
Every cell in the body has DNA in
its chromosomes, and half of this DNA you inherit from the father,
and half from your mother.
But .. in addition .. every cell contains little rings of DNA
in the mitochondria - the 'mitochondrial DNA' or 'mtDNA'. And,
what makes the mtDNA special is that it is inherited just from
your mother.
It is now known that human mtDNA has about 16,569 bases. But the
bases of the mtDNA can, and do, mutate over the centuries and
the differences in the bases in the mtDNA between one person and
another shows how closely, or
distantly, they are related.
The study of human mtDNA has now shown that the World's population
can be split into the 3 groups - European, Asian, and African,
with the European and Asian groups separating from the African
group maybe 80,000
years ago. And, the 'Out of Africa'
theory suggests that all of
present mankind is descended from just one woman who lived in
Africa about 200,000 years ago.
There are many diagrams that show how the population of the World
has spread out over the millenia.
A simple diagram can be found at:
http://www.mitomap.org/simple-
tree-mitomap2009.pdf
and a very complicated one at:
http://www.phylotree.org/
A simple test of amount 400 of the
bases of your mtDNA can now be
done very easily; and this will tell
you to which major group you
belong.
But an introductory tests will do
little more that whet your appetite
to learn more and a
FULL GENOME SEQUENCING (FGS)
when all 16,569 bases are sequenced gives all the answers. This
test costs around $450.
A further advantage to having this test means you can add your
personal sequence to the GENBANK database at the 'National Center
for
Biotechnology Information'
and get your own page ... which
would be something like the page
for my mtDNA available at ...
http://www.ncbi.nlm.nih.gov/
nuccore/134270212
Ian Logan
www.ianlogan.co.uk
CopyRight2009AllRightsReserved
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DNA Definitions
..............FamilyTreeDNA
Website
........Glossary
..............of DNA Terms
Click Here
What is a haplogroup?
One way to think about haplogroups is as major
branches on the family tree of Homo Sapiens.
These haplogroup branches characterize the early migrations of population
groups. As a result, haplogroups are usually associated
with a geographic region. If haplogroups are the branches of the
tree then the haplotypes represent the leaves of the tree. All of
the
haplotypes that belong to a particular
haplogroup are leaves on the same branch. Both mtDNA and Y-DNA tests
provide haplogroup information, but remember that the haplogroups
nomenclature are different for each.
Go
To FamilyTreeDNA
Y-DNA haplogroups
mtDNA haplogroups
How is my haplogroup determined?
How are the haplogroups named?
YCC Nomenclature System
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Do
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I
found this photograph
in a quaint little antique shop
in Johnson City, Texas
(Home Town of President Lyndon B. Johnson)
Not Sure Were
It was Taken
On
the Back is a partial list of the names:
1st Row Bottom
1. Hellen Carter, 2. Mrs. Sam Fine, 3. ??
4. Matica (Mattia) Whitmire, 5.?? 6. ??
2nd Row Back
1. Mrs. Bilby, 2. Nanny Bates, 3
Maud Craig, 4. ??? 5. Tasha Gipson, 6. ???
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Elaine
Nell
Resident Genealogy Columnist
Member of the
NC Chapter Association of Professional Genealogists
MEANS Family Historian
© Elaine Turk Nell 2009 All Rights Reserved
Contact Elaine
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| Summer
2009
Furthering Your Genealogical Education
............... in Trying
Economic Times
With financial concerns around every corner in the recent global
economic downturn, many genealogists are left wondering how to pay
for continuing their genealogical education. Although national conferences
and institutes are extremely appealing and worthwhile, they can
also be expensive endeavors, especially when food, lodging, and
transportation are added. Although often less expensive than on-sight
conferences & institutes, online genealogical courses and those
offered by correspondence can still be expensive. So, what’s
a genealogist to do? What other options are out there?
Faced with an upcoming layoff in my own family, I recently made
the decision to forego attending the National Genealogical Society
Conference in the States, which was held in nearby Raleigh, NC last
month. Having never been to an NGS Conference in the States, I looked
forward to attending it since the location was announced a few years
ago. I even booked my hotel room last fall in anxious anticipation.
Shortly thereafter, however, I learned that my husband is to be
laid off later this year. So, when the time came to register for
the conference itself, I added up the hotel bill for 5 days, the
known food costs, and conference fees and decided I’d best
rethink the idea. There would also be additional food and miscellaneous
costs, and who could resist buying a few genealogical or historical
books while there? I pondered this awhile, really grieving the thought
of not attending. Then it occurred to me that some of the lectures
might be recorded as they used to be at other conferences using
a company called Audiotapes.com. Sure enough, they were! I could
buy CDs of lectures for $12 each from Jamb-inc.com, which has provided
this service for recent National Genealogical Society Conferences.
That decided it for me. While I would greatly miss the experience
of being there, the genealogical companionship, and especially the
lecture handouts, I could at least have the lectures on CD to listen
to again and again and to loan to others too. Most of all, I’d
save hundreds of dollars, and with the economy like it is, every
bit helps.
Genealogical lectures on CD and tape are sometimes sold by genealogical
and historical societies too. For example, the North Carolina Genealogical
Society sells recordings of some genealogical lectures given by
well-known genealogists David Rencher, Helen Leary, and Mark Lowe.
In addition to listening to genealogical lectures on CD or tape,
genealogists can always pour over more books! Your local public
and/or university library, especially the genealogy and/or special
collection section(s), may offer opportunities for you to read genealogical
methods books for free. You will likely be limited to reading some
of them on-site rather than checking them out though, and your selection
may be limited as well. A solution for this may be Interlibrary
Loan through your local public library.
The National Genealogical Society moved its genealogical collection
of over 20,000 books to the special collections department at St.
Louis County Library about eight years ago. Previously, the collection
was only available by loan to NGS members, but now that it is housed
at the St. Louis County Library, it is available to the public free
through Interlibrary Loan. Not only do they have books on genealogical
methodology, they also have thousands of family, state, county,
and local history books as well as abstracts of various records.
So, the next time you find yourself fretting about the economy’s
effect on your genealogical education, try some of the above ideas
to brighten your spirits and help you break down those brick walls!
Websites mentioned in this article:
Audiotapes.com: http://www.repeatperformance.com Click on Genealogy
Note: Many of these are recordings of lectures from several years
ago. Keep in mind that
while some topics & genealogical research methods are timeless,
others are time-
sensitive. Often it’s better to go with more recent lectures
to be safe, in which case it
would more appropriate to use Jamb Tapes below.
Jamb Tapes, Inc.: http://www.jamb-inc.com Click on Genealogy
North Carolina Genealogical Society: http://www.ncgenealogy.org
Look under the Publications Tab, then click on NCGS Tapes &
CDs
NGS Book Loan Collection: http://www.ngsgenealogy.org/cs/library_book_loan_collection
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| ...Using
Family History to Improve Your Health
Columnist:
Brandon M Welch, M.Sc.
www.Sggenomics.com
ItRunsInMyFamily.com
Genealogy, the
practice of finding your ancestors and charting out your family
tree, has become one of the most practiced hobbies worldwide. People
of all ages are digging into old family records and getting back
to their roots with a myriad of different tools and websites available
to assist this growing passion. One aspect of genealogy that is
less well known, but may be even more beneficial to you than collecting
interesting family stories, is charting your family health history.
A family health history is similar to a family tree in that it organizes
your ancestors in generational groups showing parent-child relationships,
as well as marriages and siblings. However, a family health history
differs from a typical family tree pedigree in that it records certain
health issues, illnesses and disorders individuals in a family have
had, and shows trends of those illnesses and disorders through families.
Doctors have long known that certain disorders can ‘run in
families’. For example, an individual with a strong family
history of heart disease has a 9.8 times greater risk for heart
disease than an individual without a family history of the disease.
Charting a family health pedigree can make health trends and patterns
in the family easier to spot. This of course, can be key to preventing
health problems from ever developing.
A clearly marked family health history will indicate to you the
need to make smart dietary and healthy living choices, as well as
be particularly motivated to get tested and screened for family
diseases on a regular basis. Sharing and discussing your family
health history with your doctor will help you to catch and treat
any problems in the early stages before it is too late.
A new website called ItRunsInMyFamily.com
will help you create your family health history online. Start your
family health history today!
Copyright 2009 All Rights Reserved
www.Sggenomics.com
ItRunsInMyFamily.com
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