Hi, YOUR: So if I'm interpreting Correctly.... SNIP Absolutly correct.. Each chromosome pair is different from the next Just like the Y chromosome is different from the X chromosome. autosomal chromosome, number one is different from chromosome number two, each is even different in size. so they must be compared to its match number one to number one and Y to Y and X to X ... ect THat is why the data found from testing the Y chromosome can not be compared to Autosomal chromosome number five.. each has its own base pairs ... Its like DNA is fruit and Y is an Apple X is an Orange, autosomal number one is a cherry, autosomal number two is a bannan, three is a lemon; they are all different types of fruit... Understand? Nelda L. Percival, Administrator of Y-DNA surname projects Gilpin, Cupp, Bonstein and Gillock My Genealogy - http://freepages.folklore.rootsweb.ancestry.com/~bonsteinandgilpin/index.htm GeneticGenealogy - http://www.geneticsand.us Blog - http://aircastles-lets-talk.blogspot.com/ GilpinGenetics: http://www.gilpingenetics.us/ Web Mistress for LCRG - http://www.rootsweb.ancestry.com/~molcgdrg