The X-chromosome has a special path of inheritance patterns .
The X-chromosome can be useful in significantly narrowing down possible ancestor lines compared to atDNA -- for example an X-chromosome match with a male can only have come from his maternal side .
The X-chromosome has a special path of inheritance patterns and can be useful in significantly narrowing down possible ancestor lines compared to atDNA -- for example an X-chromosome match with a male can only have come from his maternal side .