Family Tree DNA - General Information This site has much useful information about the various facets of DNA testing.
http://www.duerinck.com/genlinks.html
"Why DNA Testing for Genealogy and How to Manage it"
http://www.cyndislist.com/dna.htm
General information with links to other sites
Dunham-Singletary
http://wc.rootsweb.ancestry.com/cgi-bin/us?words=delcy
http://freepages.genealogy.rootsweb.com/~grannyapple/SINGLETARY-DUNHAM/HOME.html
http://www.gravesfa.org/dna.html
The Graves Surname DNA Projec