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This page discusses the possibility of linking those with the Coogan surname through the use of a test on the Y-Chromosome. The Y-DNA test can reveal a connection between males and even provide a clue to the number of generations to the Most Recent Common Ancestor (MRCA). If you are a male Coogan descendant who has already completed a Y-DNA sequence, please contact us to add your results to this page. |
| Discussion |
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What is Y-DNA?
The Y-Chromosome test effectively traces the MALE line only. If a man takes this test then it would trace through the males in his ancestry. If a match was found with another male who had been tested then that male is descended from the same male lineage. You cannot tell exactly WHERE the linkage is between the two male researchers, only that they have a common male ancestor SOMEWHERE on their trees back in time. Important: This test is different than the The mtDNA (mitochondrial) test, which is for tracking DNA that is passed only through the FEMALE line and cannot be passed on through the male line. Source: FamilyTreeDNA.com |
Genealogy DNA Test Sites
These sites provide DNA testing services: FamilyTreeDNA.com The Genographic Project |
| Y-DNA DYS Markers |
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Y-DNA-12: According to a mutation rate study presented during the 1st International Conference on Genetic Genealogy (2004), the probability that two people who match the first 12 alleles to the right share a common ancestor within 04 generations is 33.57% 08 generations is 55.88% 12 generations is 70.69% 16 generations is 80.53% 20 generations is 87.07% 24 generations is 91.41% Persons with 12 matches and the same surname have a 99% likelihood of sharing a common ancestor. Source: FamilyTreeDNA.com Y-DNA-25: According to a mutation rate study presented during the 1st International Conference on Genetic Genealogy (2004), the probability that two people who match the first 25 alleles to the right share a common ancestor within 04 generations is 61.17% 08 generations is 84.92% 12 generations is 94.15% 16 generations is 97.73% 20 generations is 99.12% 24 generations is 99.66% Source: FamilyTreeDNA.com |
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