One of our viewers asked a question about triangulation. Actually, she had a problem with
it. It came up with a triangulated group. And when she went to look at the match in the One-to-One,
one of the people was not actually a match to her. So, today I want to talk
to you about what you should do with any of your triangulated groups. Howdy, my name is Andy Lee
with Family History Fanatics. What I want to talk about today is how we can check our triangulation
groups. So, when we run the triangulation tool, you can see here I've run it with one of my kits.
And I've run it just for Chromosome Number 9 to limit the results. This is the resulting groups.
Each one of these lines is a comparison between two people that also match you. So, remember,
with triangulation, you need three people. You have yourself. You have the first person in kit
1. And you have the second person in kit number 2. Now, many of these kits are ones that I manage.
You can see because I have my email address there for those. But there are some that I
don't manage. In fact, there's some that I don't know who they are or how they are related to me.
For this I am going to take a look at a couple of kits here. I'm going to look at
B here. And I'm going to look at FLW here. Now, for triangulation, I said we need three kits.
Let's go through and let's highlight where those kits are. First off, there is my kit.
And so, that is the first kit number that we need and that's going to be person A from now on. Next
is the kit number 1 from this triangulation group. And that is FLW. So, that's going to be kit number
B or kit letter B actually.. And then finally we need the third one and that is B over here.
I'm going to confuse you by calling. B is actually going to be C. Those are our three kit numbers.
And we are going to see how they line up. Now, if I'm looking over here the
start and the end of this triangulation segment is what is important. You notice here is 3.1 million
to 7.2 million. So, I have my three kits. Now, I'm going to go over to the One-to-One tool.
And for the One-to-One tool, I'm going to put in person A and person B.
And then I'm going to go down and usually I click on the prevent hard breaks. And then I'm going
to compare. This is the results of person A and person B. If I scroll down to Chromosome Number 9,
I can see that they do have a match there. Let me go back. And now, I'm going to compare
person A to person C. So, I'm doing a person A to person B. And now, person A to person C. And
I'm going to prevent hard breaks. And I'm going to do my comparison. And this is person C. And we can
see that they also match in that area although you will notice when I'm just looking at these
two. The match between A and C is actually quite a bit bigger it starts almost at zero at 473 000
and goes up to 7.2 million. Whereas the comparison person A and B is from 3.1 million to 7.2 million.
Okay, so, let's go look at one more comparison. We need to now compare person B to person C. And
this is usually what people forget is. They will compare person A to B and they'll compare person
A to C. But you also need to compare person B to C. That way all three people have been compared
to everybody else in the group. And I can go down. And I can compare.
And this is the results for person B to C. Now, we see here that they also.
Let's see if I can line these up just a bit. That's almost pretty good. They also have a
little bit different. They go from 3 million to 10 million. So, their segment they share is actually
goes further along that than what A to C does. Which is also already different from A to b. So,
in actuality a to B has the smallest of that segment. It is 3.1 million to 7.2 million.
And then we have 0.4 million to 7.2 million. And then we have 3 million to 10 million.
Now, what we really care about when we were looking at this
is where all of them overlap. So, between 3.1 million and 7.2 million all of these three people
share that DNA with each other. Not just with me but with each other. And so, because of that. Now,
I have actually checked that triangulation group. And that is a good triangulation group. From here.
I can now put these two these three together and be looking for what the common ancestor is. I
might be able to do that from other relatives. For instance. I can see right off the bat here
that FLW also matches a known relative of mine on this same chromosome. So, I'm likely going to
put both of these people into that group even though it's just FLW that matches that other one.
So, this is a great way that we can go through and use our matches to help identify how some of
these other people are related to us. So, always check your triangulation groups. Whenever you use
the triangulation tool and you have one that you want to research. Then go over into the One-to-One
and verify that you actually share a segment in that tool. There are some times where,
because of the different algorithms that are used for some of these tools,
they may have a mistake and actually have a match that really isn't a match.
So, be sure to check your triangulation groups before you do any research.
Be sure to hit the like button and the subscribe button if you're not already subscribed.
If you'd like to learn more about triangulation, then click on this tool right over here.