The On-line Journal of Genetics and Genealogy will highlight the connections between the science of Y and X chromosome, mitochondrial, and autosomal DNA analysis and genealogy. Reference will be made to scientific and genealogy articles which complement each other and advance the study of recent family history and ancient human migrations.
Tuesday, December 10, 2019
Verogen, a forensics company, has acquired GEDMATCH
See, Debbie Kennet's post https://cruwys.blogspot.com/2019/12/gedmatch-has-been-acquired-by-forensic.html
and Roberta Estes' post https://dna-explained.com/2019/12/10/gedmatch-acquired-by-verogen/
Gedmatch members should receive an email about the changes.
Monday, June 04, 2012
Identified matches at FTDNA, Family Finder, and at 23andme, Relative Finder
I have 1440 matches at 23andMe and am Sharing Genomes with 402. I have identified 15 relationships with those 402.
The success ratio at both services is comparable at about 4%.
I also have matches at GEDMATCH, but I have not been successful in identifying the relationship with any one there who is not already identified in Family Finder or Relative Finder.
If you are in the 23andMe database, a new feature of Ancestry Finder allows you to compare all of your matches and their matches to see if there are clusters at common locations. See this post for details on a method to download all your AF matches and their matches and use a spreadsheet for triangulation of the results:
https://www.23andme.com/you/community/thread/13225/
Wednesday, August 03, 2011
X chromosome inheritance at 23andMe through Relative Finder and Ancestry Finder
The link above goes to a page that has charts for determining which ancestors contributed to your X chromosome. For a male, only his mother contributes an X chromosome. For a female both her mother and her father contribute X chromosomes. Parts of those chromosomes will be inactivated but the X can still be used for genealogical purposes.
I have 24 people who match me on the X chromosome at 23andMe through Relative Finder and Ancestry Finder. Neither FTDNA nor SMGF have published their X chromosome databases. GEDMATCH allows FTDNA customers to match their X chromosomes to other GEDMATCH participants. I haven't heard of anyone else having as many matches, but I am sure there must be someone who does. At this time I can only confirm three of the matches with one 1st cousin and with a 3rd cousin once removed and her daughter. I share a surname in the 1600s in Germany with a mother and her two sons. But since that surname is not contributing to the X chromosome before 1830, the assumption is that there is a closer link than that surname.
There are 5 and 6 generation charts for both males and females on the page. Below are the people, with their ancestor chart number, who would be on my 6 Generation Chart on the linked page with the percentage of X chromosome contribution expected from each.
1, myself ------------- 2 Denval Perkins 0% 3 Mary Ruth Ball 100% ------------ 6 George Matt Ball 50% 7 Rosa Genetta Swain 50% ------------ 12 Peter Coleman Ball 0% 13 Frances Strunk 50% 14 Thomas J Swain 25% 15 Elizabeth Kidd 25% ------------ 26 Manoah Strunk 25% 27 Susana Cortina Davis 25% 28 Jesse D. Swain 0% 29 Elizabeth Ball 25% 30 John Kidd 12.5% 31 Maliza Stephens 12.5% ------------- 52 Abraham Strunk 0% 53 Abigail Pennington 25% 54 John Davis 12.5% 55 Frances Creekmore 12.5% 58 William Ball 12.5% 59 Charlotte May 12.5% 60 Elias Kidd 0% 61 Margaret Bagley 12.5% 62 Zorababel Stephens 6.25% 63 Susan Hayes 6.25%
Percentages are averages and usually can range from 0-100.
Having this chart filled out based on your sex can assist in identifying your X chromosome matches.