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...]
To Test or Not to Test – An Excellent Question
"Should I take a DNA test?" We evaluate the reasons for - and against- taking a DNA test.*This article originally appeared in NGS Magazine, and is reprinted with permission.The first hurdle a researcher may face as they contemplate engaging with the growing field of genetic genealogy may be the decision of whether or not to take a DNA test in the first place. While DNA testing is increasingly useful for the genealogist, the power of genetic genealogy to reveal surprising or unexpected … [Read more...]
How Do I Determine Genetically Equivalent Relationships?
An understanding of genealogical relationships is necessary before diving into genetically equivalent relationships in your family history. This article will provide an overview of both concepts.Correctly evaluating shared DNA within the context of genetically equivalent relationships first requires mastery of genealogical relationships. Here we review important genealogical relationships based on some of the pertinent variables. For the sake of simplicity, we limit our analysis to biological … [Read more...]
“Who Is This?” 6 Steps to Determine Genetic Relationships of Your DNA Matches
In this article we share the steps you need to take to help determine the genetic relationships of your DNA matches.You’ve taken a DNA test. The day finally arrives when you get a notification in your email: your results are ready! You eagerly log into your account and begin navigating your genetic heritage. Eventually, perhaps after viewing your ethnicity admixture results, or looking at different genetic traits, you make your way over to your match list. There are hundreds of people who … [Read more...]
Legacy Tree Product Review: DNA Painter
DNA Painter, a DNA analysis tool created by Jonny Perl, was the well-deserved winner of the 2018 RootsTech DNA Innovation Contest. Jonny’s creation effectively meets key needs for genealogists as they engage in genetic analysis and interpretation.Evaluating Amounts of Shared DNAOne of the first approaches employed by genealogists in genetic analysis is evaluation of shared DNA between known and unknown genetic cousins. Some amounts of shared DNA are more likely for certain levels of … [Read more...]
Right Person, Right Place, Right Time: Documenting the Unknown in your DNA Test Results
Resources to help you in documenting the unknown in your DNA test results.Each DNA testing company warns that DNA testing can reveal surprises and previously unknown information about your family. In fact, customers of these databases make unexpected discoveries every day. These discoveries can be distressing and traumatic but might also be exciting and compelling. As you navigate the emotions and reactions of this experience, we recommend reviewing this list of resources to help. In other … [Read more...]
