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DNA Day at the FamilySearch Library: Difference between revisions
DNA Day at the FamilySearch Library (view source)
Revision as of 09:39, 26 April 2021
, 26 April 2021→Using DNA to Find Unknown Parents: A Case Study
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Matches are listed in order by the amount of DNA they share with you. This is measured in '''centiMorgans (cM'''). When possible, identify who the person is and how that person is biologically related to you. Be exact with your relationship and note if the person is a half-relation (half-sibling, half-nephew, etc.) | Matches are listed in order by the amount of DNA they share with you. This is measured in '''centiMorgans (cM'''). When possible, identify who the person is and how that person is biologically related to you. Be exact with your relationship and note if the person is a half-relation (half-sibling, half-nephew, etc.) | ||
Use the tool [https://dnapainter.com/tools/sharedcmv4 '''DNA Painter: Shared centiMorgan project'''] to identify possible relationships between you and your match. DNA Painter will show any possible relationships, as well as how likely those relationships are. Any other relationship is virtually impossible, unless you are related multiple times to the match. | |||
When isolating matches, if possible, identify a known relative who only shares a ''portion'' of your ancestors. For example, a grandchild would not be a good place to start, but a half-sibling would be. Identify all shared matches with that person and make sure to clearly label them. You can then label the individuals you do ''not'' share matches with, as from a different branch of the family. The best practice is to isolate paternal from maternal matches, working backwards one generation at a time. In the case of unknown parents, creating clusters of individuals that share matches with each other, even when the parent is unidentified, is essential to creating a list of potential candidates for the parent. | When isolating matches, if possible, identify a known relative who only shares a ''portion'' of your ancestors. For example, a grandchild would not be a good place to start, but a half-sibling would be. Identify all shared matches with that person and make sure to clearly label them. You can then label the individuals you do ''not'' share matches with, as from a different branch of the family. The best practice is to isolate paternal from maternal matches, working backwards one generation at a time. In the case of unknown parents, creating clusters of individuals that share matches with each other, even when the parent is unidentified, is essential to creating a list of potential candidates for the parent. | ||