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RLP 228: The Effect of Pedigree Collapse on DNA Matching: A Case Study

The Research Like a Pro Genealogy Podcast

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Query Collapse in DNA Analysis

query 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. Instead of having 32 unique third-great grandparents, this test taker has 28 unique third- great grandparents. If you just have your line connecting, go up to where they are in the other spot, that's how the pedigree collapses down.

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