Mossie's Musings

We all love sharing our DNA stories.  The challenge is what's that DNA we share with our DNA match proving?  This slide from Veronica Williams' presentation at our recent Irish Day is the challenge of genetic genealogy.  Evidence and proof are recurring themes in our AdvanceDNA Discussion Groups particularly when we're going public with our work! Here's a slide I use when introducing DNA....you only need to read the heading as the next two slides tell the story of what's needed to meet the proof standard.  Why not join our DNA sessions and find out more?  Genetic genealogy is a new tool for the family historian and, as I now say, the biggest revolution for the family historian since the invention of paper!  Our understanding of using this tool in our family history is evolving very quickly.   The next slide is a summary of the dot points above.  In essence, the more distant the likely relationship the more evidence is required to prove the relationship beyond reason

Below are notes for those who attended the session at the Society of Australian Genealogists by webinar on 28 August 2020.  Others are welcome to use these notes for their personal research.  Please contact me at chrisw9953[at]gmail[dot]com for other uses.  I'll strive to update the notes as there are further developments or my understanding of the area grows. Chromosome mapping is a methodology that- looks at the autosomal and X-DNA you share with your matches and identifies which ancestor or ancestral couple passed that segment of DNA to you. For males, we map chromosomes 1 to 22 and the X chromosome (at chromosome 23) inherited from the mother.  For females, we map all chromosomes 1 to 23 as females get one X chromosome from their father and one from their mother. Why map chromosomes? It's fun!  We know that we receive 50% of our DNA from our father and 50% our mother.  But how much did we received from each of our 4 grandparents, 8 great-grandparents, 16 2nd great-grandpare

1     Activities To undertake these activities, you should register for a free  DNAPainter.com  membership.   Activity 1 - Ancestral Tree tool Using the Ancestral Tree tool- manually prepare your pedigree tree back to your great grandparents, download a picture of the tree and share a copy of the tree to DNASydneyDiscussion[at]gmail[dot]com. Activities 2&3 - What are the odds (WATO) tool Use WATO Version 1 for this case study.   Just do as much as you can.  There will be plenty of time for questions and discussion at our next session.   You can email any questions prior to the next session to DNASydneyDiscussion[at]gmail[dot]com. Research question: What is Gail's relationship to Chris, Deb, John and Rob? This is an example of a DNA dilemma from my family.  You were introduced to the case study during Friday’s session.  At our next session, we’ll take some twists and turns with the case study to look at the WATO tool. What we know: Gail is a shared match with Chris, Deb, John