The kindness of the genealogy community continues to overwhelm … literally! We have enough data for now and are slowly making our way though the contributions of dozens of volunteers. We cannot thank you all enough!
What Are the Odds? is the most powerful tool available today for figuring out where someone fits into a tree of their DNA matches. That person could be an adoptee, someone with an unknown parent or grandparent, or even an unidentified body.
It has limits, though, especially when endogamy, pedigree collapse, or incest are involved.
The good news, though, is that The DNA Geek has teamed up with Margaret Press of the DNA Doe Project to develop a WATO-on-steroids that can handle complex cases. It’s still in development, but the basic programming is in place. Right now, we’re in need of simple, real-world data to put it through its paces.
Double Cousin Data Wanted
Do you have double first or second cousins? A double cousin occurs when two siblings from one family marry two siblings from another family and both couples have children. Those children are first cousins to one another twice over, through both of their parents. Double second cousins are the children of double first cousins.
If you do, perhaps you can help us test the new tool. The diagrams below show what we need.
In words, we’re looking for cases where someone with both a single first cousin and a double first cousin (dark gold above) from the same family has done an atDNA test, as have the two cousins (medium gold). We need to know the centimorgan amounts shared by the main person to each of their two cousins (indicated by the red arrows).
If your matches don’t quite line up with this diagram or the double second cousin one below, we can’t use your information just yet. But don’t lose hope! We’ll be testing different scenarios in the future.
The best way to submit the data would be to download or print out the diagram, scribble names (or aliases) in the gold boxes, and write in the centimorgan values in the arrows. If your matches are at 23andMe, please omit any X segments from the total, and if they are at FamilyTreeDNA, please subtract out segments less than 7 cM.
Doing it this way will streamline the data tracking on our end. You can email a copy of your finished diagram to margaret.press (at) gmail (dot) com.
Here’s the diagram for double second cousins:
Thank you in advance to this wonderful community that works together toward our common goals!