Autosomal DNA is challenging. Although the results of atDNA testing contains vastly more information than either Y-DNA or mtDNA, it is significantly harder to utilize and understand. To wring as much information as possible out of atDNA test, genetic genealogists use every tool available.
One of those tools is triangulation. Although the topic of much debate recently, and subject to several important considerations and limitations, most genealogists agree that triangulation is a valuable tool for working with segments (especially among close relatives).
Unfortunately, there is a lot of misunderstanding when it comes to what is – and what is not – triangulation.
Let’s take a quick look at what triangulation means with regard to atDNA, and why it matters.