There are only a handful autosomal DNA testing companies in existence
and each company brings something different to the table. Testers that are actively
engaged in genetic genealogy still hope for the holy grail of testing
companies. Often times we have to use a
combination of resources to get results.
One classic example of where I had to use 23andme, AncestryDNA,
Ancestry.com and Gedmatch to see just how different each company as it pertains
to identifying genetic relationships among its testers. Another peculiar thing that may occur is what I like to call phantom segments. These segments may appear in a child's profile and not the parent's profile. Situations such as these require further analysis that the DNA testing companies do not provide. The following example demonstrates why you must use your arsenal for analysis:
Monday, August 24, 2015
Wednesday, August 19, 2015
Guess Who's Coming To Dinner
When I first started delving into genetic genealogy I really didn’t
have a lot of expectations. I simply thought
it would be a cool way to tie the paper trail and research that I had amassed
with my genes. As I explored and
conversed more and more with others in the genetic genealogy community, I
noticed that there was a common theme that occurred in African American circles…resistance
from European descent DNA matches. The
incidents that occurred seemed unreal, especially in this day and age. Some of the exchanges were pretty funny. But yet and still there is some resistance
from European descent testers to collaborate or even corroborate information
with African descent testers. Back in
July 2015, I fell victim to the same rejection as my cohorts. The note was crafted in what many would consider to be code language. The message was
crafted as not to offer offense or as not to give the appearance that there was
some form of bias toward me; but I knew better. Like all things, I handled it like a champ
and moved on. I won’t lie, it still kind of stings when I
think about it.
Tuesday, August 18, 2015
Sometimes Life Hits You Like A Ton of Brick Walls
For the past 6 years, two mysterious individuals have been hanging out
on my family tree…no parents, no subsequent census records beyond 1920, not
even a hint from another tree. I felt
bad for Ruben and William. It appeared
as if they were orphaned at a young age and now they are somehow orphaned
within my family tree. So let me back up
and explain the plight of these 2 brothers and how their existence probably
caused more confusion than answers. It
actually starts with another enigmatic relative in my tree, my 2nd
great grandmother Roselia Rogers (née Howell).
Wednesday, August 5, 2015
Gedmatch GEDCOMS
Gedmatch is a genetic genealogist's delight. You can find DNA matches that have uploaded their raw data from the Big 3 (FTDNA, 23andme and AncestryDNA) and create cool spreadsheets from Gedmatch's various analytics tools. I highly suggest forking over the additional $10 to use the Tier 1 tools as you will eventually need them.
One of my new favorites, is the GEDCOM + DNA Matches tool. Gedmatch allows users to upload a Gedcom (a text file that contains genealogical information about individuals that can be downloaded and uploaded to sites and/or software that accepts such files.) to be linked to your Gedmatch Kit number. The GEDCOM + DNA Matches tool ( I will refer to the tool as GDM moving forward) takes a list of your matches that have uploaded a Gedcom file to the system and produces a lists of those individuals. You can click onto the match's Gedcom file and look for matching relatives or clues for the MRCA (most recent common ancestor) between you and the match. Now the caveat is that this tool will only display DNA matches that share at least 10 cM's of autosomal DNA, so this will not included matches that are considered a match within in a genealogical timeframe at 7cM's of autosomal DNA and this will not included matches in which you share X-DNA only (no autosomal).
If you've tested with the Big 3, I strongly suggest that you upload your raw data to Gedmatch along with your Gedcom. In conjunction with segment triangulation, this tool will assist with opening doors and tearing those genealogical brick walls that so many of us experience.
One of my new favorites, is the GEDCOM + DNA Matches tool. Gedmatch allows users to upload a Gedcom (a text file that contains genealogical information about individuals that can be downloaded and uploaded to sites and/or software that accepts such files.) to be linked to your Gedmatch Kit number. The GEDCOM + DNA Matches tool ( I will refer to the tool as GDM moving forward) takes a list of your matches that have uploaded a Gedcom file to the system and produces a lists of those individuals. You can click onto the match's Gedcom file and look for matching relatives or clues for the MRCA (most recent common ancestor) between you and the match. Now the caveat is that this tool will only display DNA matches that share at least 10 cM's of autosomal DNA, so this will not included matches that are considered a match within in a genealogical timeframe at 7cM's of autosomal DNA and this will not included matches in which you share X-DNA only (no autosomal).
If you've tested with the Big 3, I strongly suggest that you upload your raw data to Gedmatch along with your Gedcom. In conjunction with segment triangulation, this tool will assist with opening doors and tearing those genealogical brick walls that so many of us experience.
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