How DNA is helping me uncover my genetic makeup!
The Society of Australian Genealogists' "Hang Outs" are giving me the opportunity to systematically record my research and then turn it into blog posts! Yesterday was the opportunity to tie together the stories of the past two weeks with my favourite topic - genetic genealogy. If you've done a DNA test and would like any assistance, please contact me at the above email. You can read the story of Jane Feeney, my second great-grandmother, HERE. You can read the story of Anton and Margaretha Gersbach, my second great-grandparents, HERE. I'll show how DNA is helping me find my genetic make up from Essie Woodlands, my paternal grandmother. Genetic evidence is necessary to “prove” our pedigree.
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Louise Coakley is an Australian genetic genealogist, member of SAG and publisher of Genie1. DNA does indeed have amazing power and I hope the information in this post demonstrates that.
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Being a DNA enthusiast, I’ve tested and have my DNA data at all the major testing companies and GEDmatch.com. My recommendation is to test at Ancestry and, perhaps, 23andMe as you can’t upload your data to these sites and have your DNA data everywhere to play in all the ponds of matches. The downside of Ancestry is that you don’t have access to a chromosome browser which you need for more distant research beyond your 2nd great-grandparents.
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Turning to our genetic breakthrough for Jane Feeney.
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We needed more genetic evidence to support the relationship. Given we were looking back to 3rd great-grandparents, we were looking for triangulation at the segment level - a more advanced genetic genealogy technique.
A chromosome browser is needed for this and, as I said, earlier, Ancestry doesn’t have a chromosome browser. All the matches where at Ancestry. We’d found none at the other testing sites or GEDmatch.com. After a lot of work, we had Liz, Helen and Sheri on GEDmatch.com.
Then payday, Helen, Sheri and Martyn all triangulated at the same segment on Chromosome 20!
We keep gathering evidence of the relationship. Today we have 29 identified descendants of Jane, Edward and Thomas. 17 of these are only on Ancestry. Pleasingly with the 12 that are at sites with chromosome browsers, we have many more segment triangulations.
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Turning to my next discovery. Last week I said these pages from the bible of my great-grandfather, Frank Gersbach, gave me clues to the family in NSW and back in Germany.
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I was confident that the five highlighted recorded deaths in Germany.
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The four entries highlighted recorded the death of Frank’s maternal grandparents, Phillip and Catharina Songen, and his uncle and aunt in German.
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I was pretty sure that Janice was my 3rd cousin with our most recent common ancestors being our 2nd great-grandparents, Anton and Margaret Gersbach. Janice confirmed this…
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So with traditional research and genetic genealogy, I’ve proved that Adam and Catharina are my 4th great-grandparents.
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In this slide, you can see my genetic pedigree that I’ve proved on my paternal grandmother’s line at this time. They are marked DNA. The search continues…
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