This is a tool designed to be a visual aid only. It does not automatically build your family tree or provide definitive proof of any relationship. Instead, it displays a grid of suggested positions for your DNA matches relative to you (“SELF”) based on the cM values of the matches from your DNA test. Use […]
DNA Relationship Tools and Relationship Analysis These projects are designed to help individuals interpret the amount of shared DNA (measured in centiMorgans, or cM) between two people who have taken a DNA test, such as those offered by AncestryDNA, 23andMe, MyHeritage, or FamilyTreeDNA. What is the Shared cM Project? The Shared cM Project is a […]
After speaking with a few people who have been kind enough to message me and critique the page and its options, I have made a fe changed, extended the options for the generation gap from 30 to 50 years and have changed the Relationship Grid colours, although I did build the page as my own […]
I have been attempting to make an export to Gedcom file option, so that if you import your unknown matches, and using the different options you start to think that you might be getting somewhere, you can click the button to “Export to Gedcom”, then import that file as a new tree into whichever system […]
I have setup a Facebook Group so that anyone interested, or that happens across this website while I am still building it join and ask questions of hints for things to add to the Relationship Grid page. https://www.facebook.com/groups/dnamatch
I have started to make a few changes, which will allow an “Export to CSV” button, it is in testing and its currently at the bottom right of Relationship Grid page, the next stage will be to create a GEDcom formatted file from the exported csv The end result I hope will allow someone to […]
This table shows the current cM parameters that the Relationship Grid is using to place matches within the cells, these cM values at some levels have been raised from the original 0cM level which they are listed by the “Shared cM Project” I decided to do this so that the lower minimum value or Maximum […]
“Pedigree collapse” occurs in genealogy when an individual’s ancestors appear in their family tree more than once, typically because the ancestors are related to each other, either distantly or closely. This phenomenon is also known as inbreeding or consanguinity when referring to closer relationships. In simple terms, it happens when the same ancestors are found […]
The Shared cM Project, Version 4.0, led by Blaine T. Bettinger, Ph.D., J.D., is a monumental effort in the field of genetic genealogy, providing invaluable insights into the shared centimorgans across a range of familial relationships. This document is a testament to the power of citizen science, combining nearly 60,000 data submissions from a community […]
This project is essentially an extension of the Shared cM Project, but it specifically focuses on more complex familial relationships and genetic phenomena. Here’s a breakdown of the key components: Pedigree Collapse: In an idealized family tree, you’d expect an exponential increase in the number of ancestors as you go back each generation. However, due […]