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December 30, 2004



December 31, 2004 Volume 3, Issue 8

In This Issue
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Editor's Corner
In the News: Family Tree DNA Announcements


Editor's Corner
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Welcome to this issue of Facts & Genes, the only publication devoted to Genetic Genealogy.

DNA testing is the most powerful tool to ever become available to genealogists. For those who are new to DNA testing for family history, it can seem overwhelming and technical. Genetic Genealogy is not any more complicated than learning about the various records available that may contain information about your ancestors.

The easiest way to learn is to take a DNA test. If you want information about your direct female line, which is your mother, her mother, and so forth back in time, you would order an mtDNA test. If you want more information about your direct male line, you must be male, or find a male in your family tree such as your brother or father to participate. For the male, the direct male line would be his father, his father's father, and on up the tree. The male would order a Y DNA test.

Family Tree DNA provides a wide variety of educational resources to help you apply Genetic Genealogy to your family history research. In addition, email and telephone consultation is available. To begin your education, past issues of the newsletter are available at our web site. Click on the link below:

http://www.familytreeDNA.com/facts_genes.asp?act=past

Send your comments, suggestions, tips, questions, and tell us about an interesting Surname Project to: editor@FamilyTreeDNA.com. We hope you enjoy this issue.

Dexter



In the News: Family Tree DNA Announcements
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Family Tree DNA is pleased to announce milestones achieved and several tools which have been implemented. The powerful tool called FTDNATiP has been implemented for all Y DNA customers, Group Administrators can now email FTDNATiP reports, and the Web Builder Tool now has an option to display mtDNA results on the Surname Project web site.

The following milestones have been achieved:

Family Tree DNA now has over 27,690 records in our database of Y-DNA results. We also have over 1,400 Surname Projects, which include over 9,000 surnames.

The powerful tool called FTDNATiP has been implemented for all Y DNA customers. Previously, FTDNATiP had been implemented for Group Administrators. Customers will now find the FTDNATiP icon when you click on the Y-DNA Matches selection on your Personal Page. To the right of each person on your Y-DNA Matches Page, for whom FTDNATiP is available, you will find the FTDNATiP icon.

If you are a member of a Surname Project, the FTDNATiP icon will appear for all matches who are members of your Surname Project. If you have any matches outside your Surname Project, the FTDNATiP icon will appear for matches at 25 Markers and 37 Markers.

If you are not a member of a Surname Project, the the FTDNATiP icon will appear for matches at 25 Markers and 37 Markers.

FTDNATiP does a calculation for two individual to determine the time to their most recent common ancestor. The calculation uses the individual Marker mutation rates. The result is presented in an easy to understand format, showing the probability for each hundred year period.

FTDNATiP is a proprietary algorithm developed by Family Tree DNA in conjunction with our Advisory Board Member, Dr. Bruce Walsh, a leading population geneticist.

The calculation by FTDNATiP utilizes the Y DNA results of two persons, and the individual Marker mutation rates. The individual Marker mutation rates used are a result of the study by the University of Arizona which was announced at the 1st International Conference on Genetic Genealogy, on October 30, 2004.

Documented evidence can also be input into the calculations, by entering the number of generations known that the common ancestor did "not" occur. This option is not available for exact matches, since the result of the calculation would not change.

FamilyTreeDNA is the only vendor to provide this powerful tool to the genealogy community.

FTDNATiP has several important benefits. The calculation comparing two individuals will provide probabilities for each 100 year period for the common ancestor. This information will help participants understand when the common ancestor most likely occurred between themselves and a person they match or closely match. In addition, the probabilities can influence or determine if you pursue a match. A third benefit is that FTDNATiP can be used to make the decision as to whether you should pursue a paper trail connection between the ancestors of two people who are a close match. A fourth benefit would be to identify branches of the family tree that are connected incorrectly.

Different pairs of people with the same Genetic Distance will most likely not have the same report. In other words, since each marker has a different mutation rate, identical Genetic Distances will not necessarily yield the same probabilities.

Since FTDNATiP uses the individual Marker mutation rates, a 37 Marker test is equivalent to a 56 Marker test that uses the assumption that all Markers mutate at a standard rate of .0004 or a 110 Marker test with the standard Marker mutation rate of .0002.

To learn more about FTDNATiP, see:

"Understanding Your Results: Time to the Common Ancestor":
http://www.familytreeDNA.com/facts_genes.asp?act=show&nk=3.7




Copyright 2004, Family Tree DNA "Facts & Genes"   http://www.familytreeDNA.com/facts_genes.asp

The address to join our Holland family DNA Project is
http://www.familytreedna.com/surname_join.asp?code=T68505. 

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Holland Family History and Family Tree:  Holland Family Resource Center
Diana Holland Faust 
Published  10 June 1996   This page added 19 December 2004   Last updated 17 March 2012