Linda Newman's Family Tree: FamilyTreeDNA and the tools available on that site

I have written in the past about having my DNA tested at both AncestryDNA and at 23andMe. Those are not the only two companies that do DNA testing, and a couple of those companies allow you to transfer your Raw DNA data from either Ancestry or 23andMe. I have taken advantage of FamilyTreeDNA's (FTDNA) service and gedmatch. With FTDNA you transfer your DNA and then have a choice of either paying $39 to unlock your matches or to ask 4 other people to also transfer their DNA to their company using a specially generated link. Gedmatch is a totally free, volunteer site. But today I am going to talk about a couple of the tools available on FTDNA

There are two very useful tools that I have found on FTDNA. The first is the "in common with" and the second is the "chromosome comparison."

The "in common with" tool allows you to search for people that share DNA with you and another member of their database. Say for example you have a confirmed 2nd cousin on FTDNA, you could then use the "in common with tool" to find others that also match the 2 of you to find other potential cousins. At this point I do not haven any confirmed matches on FTDNA, so I used it in a different way.

The first thing I did was find someone that I shared a good sized segment of DNA. I then clicked on the "in common with" tool and found we had 25 people that in one way or another we share as a potential match. I then used the second tool, the "chromosome comparison" tool.

Using the chromosome comparison tool I found out that 12 of the 25 people we had as common matches matched both her and I at the same area on chromosome one.

What does that mean? it means that at some point in our trees the 14 of us share a common ancestor, or ancestors. Now working together we can try and figure out who that ancestor is.

There is just one problem, when writing these matches I am finding some of them are not understanding what I am talking about when I mention the "in common with" tool and the "chromosome comparison" tool. So I have made the following pictures to hopefully help others understand these tools and how I used them.