Does it mean something specific about how we could be related? Look at Blaine's probability chart here: Chart5and you will see that some ancestors have a much higher chance than others (in the same generation) of contributing an X segment.If there are no autosomal segments that meet the threshold, then you are unlikely to have a close relative because most third cousins and below will show up as autosomal matches.
For example attached picture is my father to me(Male) on X. If he tested at then his ID starts with A___ and he may have an extensive pedigree listed there and you may find collateral lines down to present.
Others could confirm this to be true because it is only a hypothesis based on a few examples that I have observed. This is what made me curious, since in addition to the 22 c M full match, around 50% of the entire remainder of the chromosome shows as matching.
I had seen the probability chart before, but never paid close enough attention to the actual numbers - very interesting. I'm guessing that it's extremely likely that they report 2 characters per position as well, since I only see either full base pair matches, or none... @Kathy Johnston: Regarding the small/tiny segments - yes, there are a great many small matching areas.
) that match at GEDmatch then I think that is a sign that you share the same ethnic (population) makeup with this individual through the X chromosome and you may share a lot of distant geographically based ancestry on that line.
Others could confirm this to be true because it is only a hypothesis based on a few examples that I have observed. if he tested at 23and Me he will have an M___ ID number and you can ask him to check his ancestry composition on the X and see what the Speculative, Subregional resolution shows.
Even small segments can be significant for a male on the X because there is not the same likelihood of pseudo-segments caused by having two Xs.