Actually there is 1 other caveat that hasn't been mentioned (at least up to the sending of this digest).  The criteria for female to females is much much more restrictive than ordinary autosomal DNA.  IOW I have many 10 cM matches to females on my X at the same place; and yet they don't match each other.  I think Anne T said the limit for females (at least at 23) was 12 cM (instead of the usual 7 cM); and I think the # of SNPs was also more restrictive.  So I think the strict answer to your question is probably yes.  But if you had said 11.9 cM, the answer might have been probably not. John L WJH wrote From: Wjhonson <wjhonson@aol.com> Subject: Re: [DNA] X-inheritence To: paul.rakow@cantab.net Cc: genealogy-dna@rootsweb.com Message-ID: <15067e1ef32-64c4-8922@webprd-a69.mail.aol.com> Content-Type: text/plain; charset=utf-8 So if a father matches on the X to some cousin for say 20cms, the daughter should match *exactly* the same to that cousin Is that correct?