Shared X-DNA Segment Without Shared Autosomal DNA

A member of the Transitional Genealogists Forum email list, Kathie, posted an excellent question this morning, which I’ve paraphrased below: What does it mean when I don’t share autosomal DNA with an individual, but do share an X-DNA segment? A basic understanding of human genetics is pivotal to interpreting DNA test results. A chromosome “is […]