The DNA Coverage Estimator is now available and makes the process of identifying matching ancestors through DNA much simpler than ever before. In April 2018, Legacy Tree Genealogists published an article by Paul Woodbury introducing the concept of DNA coverage – the amount of an ancestor’s DNA represented in a DNA database through the test results of their tested descendants. Different descendants of an ancestor inherit different portions of that individual’s DNA. Therefore, they have … [Read more...]
Introduction to Ethnicity Admixture
Paul Woodbury is a DNA team lead and professional researcher at Legacy Tree Genealogists where he has helped to solve hundreds of genetic genealogy cases. In this article, a reprint from an issue of NGS Magazine, Paul discusses how genetic ethnicity estimates can provide valuable clues for the composition of a test taker’s family tree. This article is published with permission.Obtaining autosomal ethnicity admixture results is the primary reason many people perform DNA testing. The DNA … [Read more...]
Eight Steps to Pursue with New Autosomal DNA Test Results
Paul Woodbury is a DNA team lead and professional researcher at Legacy Tree Genealogists where he has helped to solve hundreds of genetic genealogy cases. In this article, a reprint from an issue of NGS Magazine, Paul discusses steps a researcher could take to begin using DNA test results. This article is published with permission.Several weeks after the submission of a DNA sample, the results finally arrive! An email appears announcing that the test has completed processing. It includes a … [Read more...]
Where to Test? Genetic Genealogy Testing Options
Paul Woodbury is a DNA team lead and professional researcher at Legacy Tree Genealogists where he has helped to solve hundreds of genetic genealogy cases. In this article, a reprint from an issue of NGS Magazine, Paul discusses four major DNA testing companies’ tools and their benefits. The article is published here with permission.Four major DNA testing companies offer genetic genealogy testing—23andMe, AncestryDNA, FamilyTreeDNA, and MyHeritage— and there are several smaller testing … [Read more...]
Foundations for Genetic Genealogy Success: Profiles and Family Trees
Our own Paul Woodbury follows up on his article about the journey of a DNA sample with a discussion of how profiles and family trees are the foundations for genetic genealogy success. This article is a reprint from a recent issue of the National Genealogical Society Magazine and is published here with permission. In my previous article, "From Spit to Screen: The Journey of a DNA Sample" I described the journey of a DNA sample from the moment a sample is taken to the moment a test taker … [Read more...]
From Spit to Screen: The Journey of a DNA Sample
One of our researchers, Paul Woodbury, describes the journey of a DNA sample from the instant the sample is taken until it is analyzed in the laboratory. The following article is a reprint from the July-September 2020 issue of the National Genealogical Society Magazine and is published here with permission. How does DNA testing actually work? How can spitting into a tube result in an ethnicity estimate, a list of genetic cousins, and other DNA data? This article reviews the technology … [Read more...]
The Biological Journey of DNA Inheritance: Meiosis to Fertilization
Understanding the biologial journey of genetic inheritance can help in the interpretation of DNA evidence for genealogy research.*This article originally appeared in NGS Magazine, and is reprinted with permission.Different DNA inheritance paths can help solve genealogical mysteries. These unique inheritance patterns provide important context for interpretation of DNA test results and enable genealogical discoveries, but why is DNA inherited the way it is? What underlying biological … [Read more...]
The Journey of DNA’s Inheritance Paths: X-DNA and Autosomal DNA
The stories in this article demonstrate how X-DNA and autosomal DNA can be used to solve research problems based on DNA inheritance patterns.*This article originally appeared in NGS Magazine, and is reprinted with permissionThe DNA in humans today has taken a far- ranging journey from ancestors of long ago. The stories in this column demonstrate how DNA can be used to solve research problems based on inheritance patterns. Each human has DNA, a biological code that affects many physical, … [Read more...]
Shocking Ethnicity Estimate Leads to Life-Altering Discovery
A surprising ethnicity estimate leads Tom to explore the possibility that the father who raised him was not his biological father.Sometimes, genetic genealogy test results don’t fit with what you might expect given what you know (or think you know) about your family tree. These anomalies can sometimes be explained by the way in which estimates are generated. Other times, surprising ethnicity results are instead due to cases of recent misattributed parentage. Such was the case with Tom. We … [Read more...]
The Journey of DNA’s Inheritance Paths: mtDNA and Y-DNA
DNA has taken a far-ranging journey from our ancestors of long ago. The stories in this article demonstrate how mtDNA and Y-DNA can be used to solve research problems based on DNA inheritance patterns.*This article originally appeared in NGS Magazine, and is reprinted with permission.Each human has DNA, a biological code that affects many physical, emotional, and behavioral characteristics. Humans inherit copies of DNA from their parents, who in turn inherited portions of DNA from their … [Read more...]