An example of four people matching on chromosome 4

This is an example of four people who match me on chromosome 4 using data stored in FamilyTreeDNA, a commercial service. The four differently colored bands on the chromosome map numbered 4 is the indication. FTDNA's chromosome browser is a way of visualizing the match. I supplied FTDNA with a copy of my Ancestry test and for a fee, they entered it into their database. Currently, I have 2545 matches on FTDNA.

I did the original test on Ancestry which lists about 30,000 of which 1125 are labeled 4th cousin or closer. I also loaded the test on GEDmatch which is a free site (unless you wish to use advanced utilities, which I do). There I have nearly 10,000 single matches and 4,000 triangulated matches.

I have written software that analyzes the output from GEDmatch. Using that software, I have determined that two of the people listed in the chart are in GEDmatch and FTDNA and two are only in GEDmatch. My software tells me that there are 31 more people in GEDmatch have the same match. And I know that my maternal aunt matches more than 31 in the same place on the same chromosome.

My path into dna testing for genealogy

I have been a member of Ancestry since 2003 and I have used their resources to find out about me genealogy off and on since then. In 2014, I took their dna test. Shortly thereafter, I persuaded my aunt, on my mother's side, to take the test. After that, I persuaded my wife, an aunt on her mother's side and an uncle on her father's side to take the test. Finally, I got my brother-in-law to test.

I now have 6 tests to use for reaching back literally centuries.

I joined GEDmatch and submitted all of the test results I received from Ancestry for insertion into the GEDmatch database, GEDmatch has a number of utility programs to extract and display match information. Each of the samples I submitted have 8000 to 10000 matches. Since many individuals have multiple matches, these numbers do not represent the number of people matched.

I submitted my Ancestry dna information to FTDNA and there I have about 2000 matches with individuals, most with multiple segment matches.

I am a retired software engineer. When I assessed how much information that I had at my disposal, I concluded that computer analysis would be more useful than going through each match by hand. I have 11 different programs that provide that analysis.

I have some programs that analyze the data I collect from GEDmatch. I use the Tier 1 utilities for segment matching and triangulation. They are the only ones that give specific chromosome and segment information related to an individual. Using two utility programs, data from the GEDmatch output is extracted and placed in a database.

I also wrote a program to analyze data extracted from the FTDNA information. So far, this information is not integrated into the database containing GEDmatch data. It might be at a later date. FTDNA dna data info from any FTDNA user can be inserted into the GEDmatch website database.

Up until recently, I have searched AncestryDNA visually for matches. This is a very tedious process. I discovered another website, DNAGedcom, had a useful utility, DNAGedcom Client. It could be used to log into Ancestry and download all matches above 6 cM (centiMorgans) and all trees that a match was associated with. Login access to both Ancestry and DNAGedcom is required to use this utility. When I used this on my own tree, I found that I had around 25,000 dna matches in Ancestry and over one million lines of matching tree information. Clearly, I needed more programs.

I wrote a program that analyzes the downloaded Ancestry data and produces a list of the urls to all trees that have matching people in my tree and have matching dna.

Now I have an arsenal of analysis tools. I expect the arsenal to grow as I learn more about genetic genealogy.

Repurposing this blog

I have decided to change the purpose of this blog to a discussion of genetic genealogy and issues surrounding it.

If I should get readers and/or followers, I will perform analysis of data for them. I have developed extensive software to perform this analysis.

Nick Anderson: Class Warfare - Nick Anderson - Truthdig

http://www.truthdig.com/cartoon/item/class_warfare_20130924/#.UkIkiaQzZGo.gmail

Roy G. Biv - Wikipedia, the free encyclopedia

http://en.wikipedia.org/wiki/Roy_G._Biv

Anyone notice white or black in this sequence?

When languages have color terms, they always have white and black, but not always the other color terms. The next most predominant color term is red, then green-yellow, then blue, with the rest following.

The accidental universe: Science's crisis of faith—By Alan P. Lightman (Harper's Magazine)

http://www.harpers.org/archive/2011/12/0083720

This is a very good survey of new cosmological thinking.

I have been very suspicious of the anthropic principle for a long time; I have mostly rejected it. The finely-tuned universe has been equally suspect, to me. Now I have hope that these ideas are unnecessary. Any number of other universes probably are most probably not properly tuned to support life as we know it. I also find that the "final goal" of science to be possibly illusory to be quite amusing and satisfying.

Sunset and Ladron Peak

Testing out my new Canon EOS Rebel T2i. Photo is unprocessed by any photo editting program.