WikiTree can now automatically display up to 7 generations of your ancestors who could have contributed to your X chromosome.  See: http://www.wikitree.com/treewidget/Roberts-7085/89 However I believe the description could be improved.  It currently reads: "Men inherit their X-chromosome from their mother. Women get half from each parent. The percentages below are rough guidelines for an average of how much of Peter's X-chromosome was inherited from each ancestor. These are adapted from Blaine Bettinger's X-DNA charts. " I believe it should read: "Males inherit one X-chromosome from their mother.  Females inherit one X-chromosome from their mother and one X-chromosome from their father.  The chart below shows up to 7 generations of known ancestors who could have contributed to Peter’s X-chromosome and their approximate average percentage of contribution." What do you recommend as a more accurate description? Soon WikiTree will also be able to automatically display about 7 generations of a person's descendants who could have inherited their ancestor's (that person's) X chromosome.  I asked for WikiTree to display at least 10 generations for the above but I've not been successful in that regard. Thanks and sincerely, Peter Peter J. Roberts WikiTree is a free single online collaborative family tree which can link direct paternal lines to Y-DNA results and direct maternal lines to mtDNA results, and comparison charts for each.  Registered members can connect their private family histories to the tree. http://dna-explained.com/2013/11/04/wikitree-and-dna/