DNA for Genealogists (Intro) - Rcasey.net

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How Y-STR worksOnly works with all male linesRelatively faster mutating DNA that matchesgenealogical time frame (100 to 1,000 years)Great for answering yes / no / maybe relationshipsTakes a lot of submissions to build a genetic clusterand determine relationshipsGenerates clusters of related lines but does not showhow lines are connectedOverlapping haplotyes sometimes makes itimpossible to assign to only one genetic clusterY-SNPs greatly complement some of the shortfalls ofthe Y-STRs by themselvesAugust, 2012 8
How Y-SNPs workDefines genetic branches between 500 and 5,000+ yearsWith 58,000,000 base pairs for possible Y-SNP testing, less thanone percent of Y-SNPs have been discovered / analyzed to dateSeveral new Y-SNPs being discovered every weekY-SNPs create father / son relationships that reveal exactgenealogical relationships between Y-SNPsMutations between Y-SNP and genealogical cluster definefingerprints which show common mutationsMany unrelated Y-STRs have such common marker values thatclose matches are not even related (Y-SNPs help break up theseclusters of unrelated Y-STR submissions)Y-SNPs will grow from 500 to 50,000 where future Y-SNPs willcreate thousands of branches within genealogical clustersAugust, 2012 9
Page 2 and 3: Intro to DNA for GenealogistsType o
Page 5 and 6: How Autosomal worksCovers all ances
Page 7: GEDMATCH Database - atDNAAttempts t
Page 11 and 12: How do Y-STRs workOnly found on Y-D
Page 13 and 14: How Autosomal tests worksCovers all
Page 15 and 16: Books to get up to speed withTrace
Page 17 and 18: Cost of Testing (Retail - FTDNA onl
Page 19 and 20: Future trendsY-SNP tests will becom
Page 21 and 22: War stories - atDNA for CaseyCommon
Page 23 and 24: War stories - YDNA provides answers
Page 25 and 26: War stories - YDNA provides answers
Page 27 and 28: Questions & AnswersIt takes a while
Page 29 and 30: This issue is rarely covered by boo
Page 31 and 32: August, 2012 31
Page 33 and 34: Y-SNP analysis is the futureEvery s

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