Outline of Segmentology

The outline below shows the topics I plan to cover in this blog. Some are hyperlinked to the blog posts. This outline may be adjusted from time to time as new topics come up.

[00] Segmentology: Outline of Segmentology (updated 9 Sep 2017)

[01] Introduction and Disclaimer – I became an engineer in 1966; a Naval Officer in 1967; a genealogist in 1974; a registered Professional Engineer in 1980; a genetic genealogist (when I started a Y-DNA surname project) in 2002. I have bought original DNA kits at FTDNA (Y-111 and Big-Y, SNPs, FMS, atDNA), 23andMe, AncestryDNA, Genographic, Genos (exome), LivingDNA and MyHeritage; and uploaded to Y-Search, mitoSearch, NIH, GEDmatch, and DNA.Land. I lecture on genealogy and DNA to genealogy groups and conferences. I have no contract, compensation, or allegiance with any company. I am an unpaid volunteer at GEDmatch; a Surname Project Admin at FTDNA; and a long-time subscriber/researcher at Ancestry and FamilySearch. Statements/opinions are my own.

[01A] Getting Started with Autosomal DNA Part I (22 Nov 2015)

[02] What is a segment? – Ancestral (true) Segments vs Shared (computer) Segments (7 May 2015)

[03] Measuring Segmentsbp (or Mbp); cM; SNP (13 May 2015)

[03A] Fuzzy Data, Fuzzy Segments – No Worry (30 May 2015)

[04] How Ancestral segments are formed – Recombination & Crossover Points

[05] Segments

[05A] Segments: Bottom-Up (24 May 2015)

[05B] Segments: Top-Down (1 Jun 2015)

[05C] CA and MRCA (2 Jan 2016)

[05D] Crossovers by Generation (2 Feb 2016)

[05E] Anatomy of a TG (5 Feb 2016)

[06] Segment size vs cousinship – Mathematical averages vs Range (Blaine’s data)

[06B] Segment Size vs Cousinship –Chart Needed –Estimated Curves (7 Nov 2015)

[06Z] VUCA DNA (24 Aug 2015)

[07A] Ancestors – The Porcupine Chart (Biological vs Genetic Ancestors) (7 Aug 2015)

[07B] Ancestors – “Sticky Segments

[07C] Proof of Stick Segments (16 Nov 2015)

[08] Triangulation Concept – no genealogy (emphasis on tool)

[08A] Your TGs are Pretty Unique! CONCEPT (7 Sep 2017)

[09] Benefits of Triangulation (9 May 2015)

[10] How To Triangulate: Collect, Arrange, Compare/Triangulate (11 May 2015)

[10A] How To Triangulate: GEDmatch; 23andMe; FTDNA – screen shots

[10B] Triangulated Groups – Assign and Determine Ancestors – genealogy, admixture

[10C] Triangulation: CA vs MRCA – diagrams [see [05C]

[10D] Triangulation: Getting Past Brick Walls

[11] Why Triangulation works (1 vs 2 chr; IBD segs)

[11A] Does Triangulation Always Work? (10 May 2015)

[11B] Does Triangulation Work? (19 Oct 2015)

[12] Triangulation “Rules

[13] Triangulation vs IBD – Chicken/Egg

[13] Small Segments and Triangulation (30 Sep 2015)

[14] Triangulation vs Phasing

[15] How Triangulated Groups (TGs) play out in practice

[15A] Understanding and using TGs (18 Sep 2016)

[15B] The Attributes of a TG (19 Sep 2016)

[15C] Chromosome Mapping – physical (stone wall, no gen); link ancestors to TG segments)

[15D] Jigsaw puzzle

[15E] Chromosome Mapping: Finding NPEs

[15F] Estimating Distant Cousinships

[15G] A Targeted Process at AncestryDNA (20 Oct 2016)

[16] Segment analysis

[16A] Parents

[16B] Siblings

[16C] Close relatives

[16D] Endogamy PART I – Shared DNA (2 Dec 2015)

[16E] Endogamy PART II – One Segment from One Ancestor (5 Jan 2016)

[17] Spreadsheets

[17A] Format – what data

[17B] Recommendations

[17C] Getting data

[17D] Updating data

[17E] Tips on using a spreadsheet as a tool

[18] Pile-ups: Small segments; TG segments (7 Oct 2015)

[19] Glossary of Terms (cf ISOGG)

[20] Links

[21] Misc

[21A] Why Upload to GEDmatch or FTDNA? (11 Jun 2015)

[22] Segmentology TIDBITs

[22A] Crossover and Segment Formation TIDBIT (2 Jan 2017)

[22B] Number of Matches on a Segment (or TG) TIDBIT (2 Jan 2017)

[22C] Roughly Right is OK for Genealogy TIDBIT (2 Jan 2017)

[22D] Only One Comparison Needed to Add a Segment to a TG TIDBIT (2 Jan 2017)

[22E] Save the Clues TIDBIT (2 Jan 2017)

[22F] Walking the Ancestor Back TIDBIT (4 Jan 2017)

[22G] Uploading to GEDmatch TIDBIT (19 Jan 2017)

[22H] One Segment at a Time TIDBIT (18 Feb 2017)

[22I] Format for AncestryDNA Notes TIDBIT (7 May 2017)

[22K] Amount of DNA vs Number of Matches TIDBIT (17 May 2017)

[22L] Using a Child to Determine the Side TIDBIT (12 Jul 2017)

[22M] Triangulation at 23andMe TIDBIT (20 Jul 2017)

[22N] A Triangulation Overview TIDBIT (28 Jul 2017)

 

[99A] Anatomy of an IBS segment by Ann Turner  (2 Oct 2015)

 

3 thoughts on “Outline of Segmentology

  1. I am so thankful for all of your explanations on all of your blogs I am learning so much. I am so grateful to you for sharing your expertise with all of us because it becomes so frustrating many many thanks for all of your hard work and sharing of your expertise

    Like

  2. Jim, I know you have ‘spreadsheets’ on your to-do list, but do you have yours or a dummy version of it (stripped of your own data) available anywhere for a peek at? I am in the early stages of the process and I can see it will take me a couple years to re-invent my own wheel. I’m particularly interested in how you organized your family tree info to facilitate searching for MRCA with matches, and organizing data for triangulating.

    Liked by 1 person

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