Group Project members have the ability to assign access levels for their Group Project Administrators and Co-Administrators. Assigned on the member's Project Preferences page, these access levels determine what member information an administrator can view and in some cases, modify. The following [...]
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Please note that as of January 30, 2019 the Big Y-700 test is now available, and the Big Y-500 test is no longer available for purchase. The Big Y is a Y-chromosome direct paternal line test. We have designed it to explore deep ancestral links on [...]
For FamilyTreeDNA, a novel variant is a difference on a person's Big Y test from the reference sequence that has not been before seen. Novel variants may or may not be unique to an individual and will be listed separately [...]
Al Aburto is a member of the genetic genealogy community and a group project administrator. He became involved in genetic genealogy in 2005. He is retired and lives with his wife in Southern California. Apart from genealogy, they are involved [...]
Eugen Hartmann joined the genetic genealogy community in 2009. He is the group project administrator of two geographic projects. Both focus on those of German descent. He lives and works in Russia with his family. Eugen Hartmann Rebekah: [...]
Tim Janzen is a community leader in using autosomal DNA (what we inherit equally from both parents) to trace and affirm family connections. With an extensive background in traditional genealogy and especially Mennonite genealogy, Tim has lead efforts to develop [...]
Today, I am interviewing Gail Riddell of New Zealand. Gail is a power project administrator. She is the administrator of 25 DNA group projects and is the co-administrator of another 9 projects. A woman of many talents, she has worked in fields ranging from chauffeur driver to accountant. Her hobbies include crafts and gardening.
Yes. Limitations in the number of global populations used and the number of samples tested in the International HapMap recombination rate studies limit what we know. SNP values at 12 locations in sequence Mother G A T A G A [...]
Are the areas with extremely high and low centiMorgan values related to SNP Rich and SNP Poor areas?
No. SNP Rich and SNP Poor areas are due to the number and location of single nucleotide polymorphims (SNPs) chosen by the microarray chip manufacturer. If the manufacturer includes many SNPs from an area on the chip, the area is [...]
If two people share part of the same DNA segment with me, will the centiMorgan value for each segment be proportional to how long the segments look?
Overlapping DNA Segments cM Matching on Chromosome 1 Match 1 Match 2 Non-Match 20.5 7.6 No. Part of a matching DNA segment may have a higher or lower centiMorgan (cM) value than the segment's average. One of your matches will then [...]
Is it more significant if two of my matches have identical start and stop points than if the segments simply overlap?
No. When two of your matches' DNA segments share exact start and stop points, it is not more significant than when they simply overlap. There are two reasons for this. Both are due to current limitations of microarray chip technology. [...]
Several of my immediate known relatives share a matching segment with me. Why aren’t the start and stop points of our matching segments exactly the same?
There are several possible reasons for the start and stop points to not line up exactly. These are due to how recombination of DNA across generations and the Family Finder matching process work. The first reason is that part of the [...]
Family Tree DNA does not have a file format for Y-chromosome DNA single nucleotide polymorphism (SNP) results. However, your raw data, the actual values for each SNP, will be available on the Y-DNA - Haplotree & SNPs page of your myFTDNA [...]
No, the names in the mitochondrial DNA (mtDNA) haplogroups do not correspond with the same names in the Y-chromosome DNA (Y-DNA) haplogroups.
Yes. If you do not have a Y-DNA STR test, you will not be able to view your haplotree information. Alternatively, you may first take the Geno 2.0 test and then transfer your results to Family Tree DNA. You will [...]
The Family Finder test works by comparing your autosomal DNA to that of other people in our database who have taken the test. The program calculates your relationship with a match based on sharing linked segments of DNA. Any two [...]
There are two places to look for the answer to this question. The first is your haplogroup, which is identified and described for you on the Y-DNA - Haplotree & SNPs page of your myFTDNA account. The second place to [...]
The need to test for your Y-Chromosome DNA (Y-DNA) haplogroup depends on your research interests. Taking an extended Y-DNA SNP test such as the Geno 2.0 test is a good idea for those interested in their ancient ancestry and prehistoric [...]
On the Y-DNA – Haplotree page, what do the letters and numbers in the Haplogroup Information box mean?
We show the SNP (single nucleotide polymorphism) results from our Y-DNA SNP tests (transferred Geno 2.0, Advanced SNP, Backbone, or old Deepclade) under the Haplotree tool in the Haplogroup Information box. The names of the SNPs are numbers prefixed with [...]
The Y-DNA SNP Results page allows you to evaluate members according to their Y-Chromosome SNP (single nucleotide polymorphism) test results. The data columns are:Kit Number: This is the project member's kit number that was assigned with their first order. If they [...]