<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=US-ASCII"> <META content="MSHTML 6.00.6002.18100" name=GENERATOR></HEAD> <BODY id=role_body style="FONT-SIZE: 10pt; COLOR: #000000; FONT-FAMILY: Arial" bottomMargin=7 leftMargin=7 topMargin=7 rightMargin=7><FONT id=role_document face=Arial color=#000000 size=2> <DIV>Males inherit a single X chromosome from their mother and they get a Y from their father. Females inherit TWO X chromosomes -- one from their mother and the other from their father. Normally, taken alone, I'd not be able to tell which was which--but this match has to be with my dad's X because my mother's wouldn't have matched his from his mother because our relationship is provable through my dad and his mother. His mother had TWO X chromosome as all females do--but she would only pass one along to her son or daughter and the father would contribute the other -- an X or a Y depending upon the sex of the child. (There are some rare males who inherit an extra X and are XXY but that is very rare and, don't laugh, has been associated with a proclivity for being a mass murderer--for real, I'm not making this up). </DIV> <DIV> </DIV> <DIV>Joan</DIV> <DIV> </DIV> <DIV> <DIV>In a message dated 10/29/2009 7:00:35 P.M. Eastern Daylight Time, scott@appletree.com writes:</DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid"><FONT style="BACKGROUND-COLOR: transparent" face=Arial color=#000000 size=2>what a great story Joan!  I'm going to have to try 23andme now.  I'm just curious about one little thing, you wrote, "<FONT size=+0><FONT face=Arial color=#000000 size=2>what we share is a mind-boggling match on the X chromosome--through his mother (his only X) and my X inherited from my father."  What did you mean by "his only X?"  I assume you mean his mother's only X?</FONT></FONT><BR></FONT></BLOCKQUOTE></DIV></FONT></BODY></HTML>