Tuesday, August 17, 2021
Wednesday, November 25, 2020
New Zealand was the second national jurisdiction to institute legislation on the Police use of DNA. Recently the NZ Law Commission made a new report with 193 recommendations on DNA use and genetic genealogy for Police purposes. The Report recommends that more attention be given to Maori, Treaty of Watangi, and human rights issues. The report is available at The Use of DNA in Criminal Investigations.
This issue has arisen within the genetic genealogy community due to the rise of forensic, or investigative genetic genealogy, in regard to Gedmatch and Family Tree DNA. At Gedmatch one has to opt-in to allow law enforecement use (see, "Public + opt-in" and "Public + opt-out") and at FTDNA one has to opt-out to deny law enforcement use of your genetic data in criminal investigations.
Monday, July 20, 2020
Ancestry decision to remove matches below 8 cM will harm African American and Native American descendants
Sometime in August, Ancestry intends to remove matches in the 6 to 7.9 cM range from DNA match lists. This will cause problems for African American genealogists since using those matches, even if 50% are false matches, is often the only way for African American genealogists to find possible connections that predate the end of slavery and the 1870 census. You can preserve these matches by saving a note or adding them to a dot group or by messaging them. Doing so will take time but it is possible. One way is to search by custom centimorgan size and then to search for common ancestors and add a dot group for each. I have been doing this as group CA67.
The same argument can be made for people with documented genealogical ancestry from Native Americans which predates 1870. This range of matches needs to be preserved and continue to be available to anyone who wants to see them.
See this blog post from Roberta Estes, for a more in-depth analysis of this proposed change: Plea to Ancestry – Rethink Match Purge Due to Deleterious Effect on African American Genealogists
Sunday, April 26, 2020
Check the following sites for the details:
- AncestryDNA Ancestry and Health.
- Family Tree DNA Separate tests for Ancestry, and Paternal or Maternal lines. Ends 26 April 2020.
- LivingDNA Ancestry.
- MyHeritage Ancestry. Ends 30 April 2020.
- 23andMe Ancestry. Ends 26 April 2020.
- Nebula Genomics
- Dante Labs Ends 27 April 2020.
- Full GenomesDifferent coverage levels for WGS, also Y DNA tests.
I have tested with all of these companies.
Saturday, April 04, 2020
The Gene: An Intimate History weaves together science, history & personal stories for a historical biography of the human genome, while also exploring breakthroughs for diagnosis & treatment of genetic diseases & the complex ethical questions they raise.
This is an adaptation of Siddhartha Mukherjee's book, The Gene: An Intimate History, in 2 two hour long presentations. It is well worth the time for a genetic genealogist to view.
Saturday, March 14, 2020
Tuesday, January 07, 2020
Wrapping Up a Fantastic-2019
MyHeritage is one of the companies I use for my own DNA research. It is the only site where I find information on my Spanish relatives. I encourage anyone with European ancestors to the USA within the past 150 years to test there as well as with the other companies.
Tuesday, December 24, 2019
- 23andMe: Ancestry and Ancestry and Health.
- MyHeritage: Ancestry and Ancestry and Health.
For the health tests, some USA states and other countries are excluded. Check the web sites if interested.
Ancestry has sites in the UK, Australia, and Canada, as well as the USA.
Tuesday, December 10, 2019
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.
Friday, August 02, 2019
Aude SAINT PIERRE, Joanna Giemza, Mathilde Karakachoff, Isabel Alves, Philippe Amouyel, Jean-Francois Dartigues, Christophe Tzourio, Martial Monteil, Pilar Galan, Serge Hercberg, Richard Redon, Emmanuelle Genin, Christian Dina
Full paper and supplementary info at
This article is a preprint and has not been peer-reviewed
The study of the genetic structure of different countries within Europe has provided significant insights into their demographic history and their actual stratification. Although France occupies a particular location at the end of the European peninsula and at the crossroads of migration routes, few population genetic studies have been conducted so far with genome-wide data. In this study, we analyzed SNP-chip genetic data from 2184 individuals born in France who were enrolled in two independent population cohorts.
Using FineStructure, six different genetic clusters of individuals were found that were very consistent between the two cohorts. These clusters match extremely well the geography and overlap with historical and linguistic divisions of France. By modeling the relationship between genetics and geography using EEMS software, we were able to detect gene flow barriers that are similar in the two cohorts and corresponds to major French rivers or mountains. Estimations of effective population sizes using IBDNe program also revealed very similar patterns in both cohorts with a rapid increase of effective population sizes over the last 150 generations similar to what was observed in other European countries. A marked bottleneck is also consistently seen in the two datasets starting in the fourteenth century when the Black Death raged in Europe.
In conclusion, by performing the first exhaustive study of the genetic structure of France, we fill a gap in the genetic studies in Europe that would be useful to medical geneticists but also historians and archeologists.