Pedigree Collapse and DNA, Friend or Foe? Is the match on the Gilchrist/Gilchrest line, the other Gilchrist line, the Gillies line or the McIlepheder/McNeil line?

We all have pedigree collapse in our trees. You may not have found it in yours but you will. Pedigree collapse is when two of your ancestors descend from the same ancestor or ancestral couple. Sometimes called “cousins marrying cousins” pedigree collapse is not the same as endogamy. Endogamy is when cousins are marrying cousins …

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