Author Profile

Bradley T Larkin

City: Galveston

State: Texas

Country: United States

Brad is a native Texan who earned a Masters degree in Business Administration from Rice University, a Bachelor's degree in Aerospace Engineering from UCLA and is also a Microsoft Certified Systems Engineer (MCSE). Surname DNA offers Brad the chance to combine his technology background with his passion for genetic genealogy.

Recent Posts

Resources for Why the Big Y DNA Test?

“Which DNA test should I get?” is a common question posed to genealogists. This session will explain the three major types of DNA tests with a focus on Y-DNA. Costs and benefits of the various Y-DNA test options will be weighed. Most importantly, the Big Y-700 DNA test will be examined in terms of costs, […]

Resources for DNA and Digitization in Irish Genealogy 2019

The online tools for making new genealogy discoveries about your ancestors from Ireland have increased radically in the past five years thanks to DNA sampling of modern Irish residents and digitization of surviving paper records. This presentation will provide an orientation on how you can use these new resources to make breakthroughs in researching your […]

Y-DNA SNP Database Characterization

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Vertical bar chart showing the five most densely sampled countries for Y-DNA: Ireland, Finland, UK, Norway, and Sweden.

Analysis of sample count and sampling density of the Y-DNA SNP results in the Family Tree DNA results database. Comparison of World, European, and British Isles figures by country, Y haplotype, and phylogenetic tree branch count.

Y-DNA SNP Database Characterization (FTDNA February 2019)

Vertical bar chart showing the five most densely sampled countries for Y-DNA: Ireland, Finland, UK, Norway, and Sweden.

Introduction As a DNA Project administrator, I am often asked how to interpret someone’s Y-DNA results in terms of the participants expectations and curiosity as to “what country do I come from?” One aspect that new participants in the field of genetic genealogy may not appreciate is the wide variance in how much DNA has […]

Design Concepts for a Law Enforcement Assistance Genetic Database (LEAGD)

Introduction A fierce controversy has arisen in recent days on the legality and appropriateness of law enforcement using private consumer genetic genealogy databases where the consumer paid for the test and had an expectation of privacy. https://www.buzzfeednews.com/article/salvadorhernandez/family-tree-dna-fbi-investigative-genealogy-privacy https://www.providencejournal.com/news/20190207/how-genealogical-sleuthing-led-to-suspect-in-warwicks-joggers-death While many are outraged at this dramatic policy change, there are also individuals who wish to assist […]

Resources for Insights on DNA Ancestral Percentages

Many DNA testing laboratories are advertising ethnicity or ancestral population percentages for participants – but how are those figures calculated? Why are there such differences in the results from one company to another? This presentation provides insights on how these percentages are derived. Ancestral Percentages here meaning Biogeographical Ancestry (BGA) defined as an estimation of […]

Resources for DNA and Digitization in Irish Genealogy 2018

The online tools for making new genealogy discoveries about your ancestors from Ireland have increased radically in the past five years thanks to DNA sampling of modern Irish residents and digitization of surviving paper records. This presentation will provide an orientation on how you can use these new resources to make breakthroughs in researching your […]

Big Y-500 – Initial Review

Line Chart of TMRCA

On April 20, 2018, Family Tree DNA (formally Gene By Gene Ltd, aka FTDNA) announced the initial release of allele count values for 389 new STR markers (labeled as Panel 6) scored from Next-Gen sequencing data recorded on Big Y DNA existing orders. Going forward FTDNA states they will only sell Next-Gen sequencing of the […]

Don’t Discard the Y-STRs

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Chart Diagram of Y-DNA Testing Price Value Comparison

Y-37 STR testing remains the best genetic genealogy entry point for budgets under $ 200 and also for research sampling many participants in a search for matches or specific characteristics. From a live presentation given at SCGS Jamboree 2017 by Brad Larkin on 8 June 2017.