Do you have instances of multiple relationships, such as double cousins, or pedigree collapse, in your family tree? If so, the new third-party DNA tool BanyanDNA can help you analyze the amount of DNA you share with your cousins. Leah Larkin introduced Banyan DNA in December of 2023, and in that blog post she wrote: BanyanDNA is unlike any other tool for genetic genealogy. Not only can it help you identify an unknown parent, grandparent,...
Have you ever suspected that endogamy was affecting your DNA analysis? You might notice a large number of matches from an island population or isolated area. The matches might seem to share a lot of DNA but no common ancestor can be determined. Clustering matches doesn’t seem to produce clusters related along different ancestral lines. Instead, you find one big mass of tightly connected matches. The total amount of shared DNA points to a second...
Steve Little, one of our Research Like a Pro with DNA 4 Study Group members, wrote this guest blog post about how he uses diagrams to help visualize the multiple relationships with his DNA matches. He is from a community of mild endogamy — Appalachia. I hope his insights will help anyone dealing with multiple relationships with DNA matches, pedigree collapse, and endogamy. -Nicole Don’t panic! At first glance, the swirling tangle of lines below...
Today’s episode of Research Like a Pro is about pedigree collapse and its effect on DNA matching. We discuss the coefficient of relationship calculation and how that can help you estimate the expected amount of DNA two people should share based on the relationship in their trees. We talk about the Hopper case study with a DNA match with two individuals with multiple relationships and one of the test takers has pedigree collapse on the...
Pedigree collapse occurs in a person’s family tree if one of their ancestral couples are related to each other. This causes the same ancestors to be repeated in their tree. For example, if a person’s parents are second cousins through their great-grandparents Joseph Dyer and Anna Smith, then Joseph Dyer and Anna Smith appear in the test taker’s pedigree twice. Instead of having 32 unique third-great-grandparents, this test taker has 28 unique third-great-grandparents. These diagrams...
Today’s episode of Research Like a Pro is about double cousins. Do you have any? We’ll talk about how double cousins and other relatives with whom you share multiple relationships can affect DNA match analysis and genetic network analysis. Although double 3rd cousins don’t always share an inflated amount of DNA, you can definitely tell they are double cousins in your network analysis. Join us as we discuss these issues. Transcript Nicole (1s): This...
Today’s episode of Research Like a Pro is about the difference between endogamy, pedigree collapse, and multiple relationships. We discuss examples of each scenario and how it affects DNA matching and cluster analysis. Transcript Nicole (2s): This is Research Like a Pro episode 222 Endogamy, Pedigree collapse and multiple relationships. Welcome to Research Like a Pro a Genealogy Podcast about taking your research to the next level, hosted by Nicole Dyer and Diana Elder accredited...
I am sure I am not alone in finding that I constantly have more to learn when it comes to using DNA in my genealogy research. For example, I have defined many situations in my DNA research as pedigree collapse. However, after reading Diana’s post Endogamy, Pedigree Collapse, and Multiple Relationships: What’s the Difference and Why Does it Matter? I realized that almost always, when I used the term pedigree collapse, I was actually describing...
Do you have DNA matches that seem to belong in multiple genetic networks? Are you nervous that you’re seeing pedigree collapse or endogamy? Before you despair, realize that this phenomenon could be due to DNA matches sharing more than one common ancestral couple with each other, or what’s often called “multiple relationships.” In Diana’s post, Endogamy, Pedigree Collapse, and Multiple Relationships: What’s the Difference and Why Does it Matter, she talked briefly about multiple relationships...
You may have heard the terms endogamy, pedigree collapse, or multiple relationships as you’ve been learning how to use DNA with genealogy. What does your match list look like if you have any of these scenarios? What do your cluster results look like? How do you work with those DNA matches? What does this mean for your research and analysis? This article will help you understand each term and give you examples to digest. I’ll...
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