Mapping All My Frazer DNA

Thanks to a technique pioneered by Kathy Johnston, I have been able to map my DNA to my 4 grandparents. In the process of doing this, I can see where my 2 sisters got their DNA from also. One of those 4 grandparents is my father’s mother who was a Frazer. Both her parents were born in Ireland, so that helps in finding matches. I thought that it would be interesting to look at each of the Frazer DNA Project member’s matches to my family to see where they are on my family’s DNA maps.

The larger Chromosomes are the most difficult to map, as there are more potential segments and crossovers. The segments are the chunks of DNA we got from each grandparent. The crossovers are the vertical lines between the segments where the DNA we got crosses over from one grandparent to another.

Chromosome 1

I’ll spend a little more time on Chromosome 1 as it is the first.

Chr1 Frazer

  • The colors will not be consistent to a name between chromosomes. Also the position of the my and my sister’s chromosomes may not be the same
  • S and H are my sisters Sharon and Heidi. My bar is in the middle here (J)
  • The orange in this Chromosome is Frazer and represents my Frazer grandmother.
  • The numbers in the bars represent reference people. For Frazer, my reference is usually Paul, my 2nd cousin, once removed. However, I also used Jane above in this example
  • Note that if I had not tested my sisters, my chances for matching other Frazers would be very low for Chromosome 1. I couldn’t match a Frazer for most of this Chromosome. I would only be able to match another Frazer at either end.
  • When the 3 orange Frazer segments in my family are put together, we can potentially match a Frazer for the whole length of the Chromosome – except between 186 and 205.

The Triangulation Group (TG) in Chromosome 1

I’ve pointed this out before. The TG is to the right of the Chromosome and only my sister Heidi is in this TG.

TG Chr1 Frazer

Note that the first match in the TG above between MFA and Jane goes beyond where my sister Heidi could match a Frazer (198-205). This is fine as MFA and Jane have their own crossover points that are different than those in my family.

Chromosome 2

Here I’ll start with my spreadsheet matches.

Chr 2 Frazer

What might I expect here? Note that the matches are only with my 2 sisters. My guess is that I won’t have Frazer mapped on my Chromosome in these 2 areas (196-222). Also note a match with Jonathan who is on the more distant James Line of the Frazer Project. In addition, my sister’s matches with PF overlap by a small amount her match with Jonathan. This could be significant if this forms a Triangulation Group.

Here’s my family’s Chromosome 2

Chr 2 Frazer Feb

I had a little problem with this one, but it’s mostly right. Here the colors are switched, so Frazer is now green.

  • Notice that my 2 sisters, S and H have Frazer segments from at least half way through their Chromosomes to the end. This is where the matches are (195-221).
  • Notice that between me and my sisters, we should have good coverage for Frazer ancestor matches.
  • I (J row) cannot match any Frazer where my sisters matched as I have orange Hartley DNA in the area of 195-221.

Here is Jonathan’s family mapped out. He is on the horizontal line 1. Only Jonathan can match my 2 sisters from 142 to 221. His 2 sisters are on rows 2 and 3.

Chr 2 Jonathan

Any Triangulation Group?

It would be interesting if there was a triangulation group between these 2 distant lines. So far, we have not had much luck in finding one for Jonathan’s James Line. Perhaps we have one here. This is what Gedmatch shows for Sharon’s match with Jonathan in yellow and Paul in blue:

Sharon Chr 2 Gedmatch Browser Paul Jonathan

In numbers, Gedmatch also shows where the small overlap is with these 2 segments:

Chr 2 Sharon Paul Jonathan

The overlap is shown in the last column. The yellow (Sharon’s match with Jonathan) and blue (Sharon’s match with Paul overlap from 205 to 207. Let’s see what Heidi’s matches show:

Chr 2 Heidi Paul Jonathan

Here the overlap is pretty much the same, but is a bit shorter for Heidi.

So for a Triangulation Group, Jonathan would also have to match Paul. I would expect this to be a small match, so I bring down the gedmatch numbers. This is a bit controversial, by the way, but I think I’m on fairly solid footing here. I took the limits way down to 3 cM. Here are all the results of the match between Jonathan and Paul, but I’m really interested in Chromosome 2:

Jonathan V Paul 3cM

To me, it is more than mere coincidence that Jonathan and Paul match at the exact place where they have an overlap in my 2 sisters’ matches. In all 3 cases, the match is between 205 and 207 on Chromosome 2.

Is This the First James Line Triangulation Group (TG)?

Yes and no. What I mean is that this is not strictly a James line TG but a TG between the James Line and the Archibald Line of the Frazer DNA Project. We have what we need for a Triangulation group. Paul matches Sharon and Heidi. Jonathan matches Sharon and Heidi, and Paul matches Jonathan on the small segment where he needs to match him in order for there to be a TG.

A triangulation group should represent a common ancestor. But who is the common ancestor? I can think of 3 possibilities:

  • The common ancestor of the Archibald and James Lines. This is based on the known genealogies. This common ancestor probably goes back to the late 1600’s.
  • A more recent unknown James Line ancestor. I have an additional line of Frazers that I haven’t placed that may be part of the James Line. This would be a good candidate.
  • A common collateral family. That is, a common family that married into both of our families with a common ancestor. This would be the least known option.

Chromosome 3

Chromosome 3 should be simpler. There is one Frazer match with my family. That is between Heidi and Cathy. Cathy is a a descendant of Archibald Frazer b. 1802 and Catherine Parker.

Chr 3 Heidi CR

This is a small single match, so possibly not even a valid match. Let’s look to see if  this match is in a spot where Heidi got Frazer DNA from her grandmother:

Chr 3 Heidi

It looks like this match is in the about the only area where Heidi (row H) could’ve gotten any Frazer DNA match. Recall the match is from 15-21. But shouldn’t Sharon in the S Row also match Cathy in her purple Frazer segment? Actually, she does. I’m working from 2 spreadsheets and only had Sharon’s match on one of the 2 spreadsheets.

Chr 3 CR Heidi Sharon

See, the DNA corrected my oversight!

Chromosome 5

There weren’t any Frazer Project matches to my family on Chromosome 4 that I had recorded. Here is the match between my sister Heidi and our 2nd cousin once removed Paul. He also matches my sister Sharon at the same spots.

Chr 5 Paul Heidi

My prediction is that the map should look like the one for Chromosome 3 in the first part of the Chromosome. Chromosome 5 is another Chromosome that I found difficult to map:

Chr 5 Heidi Sharon Paul

Note that I didn’t get a lot of Frazer in my Chromosome 5 (last row J). There is also a section from 107 to 173 where there would be no Frazer matches with me or my sisters. Perhaps if I tested another sibling….?

Chromosome 7

Here I see a smattering of matches. I included my fairly close Frazer relative Paul as a reference even though he doesn’t match my family on this Chromosome.

Chr 7

Here, none of these matches come together. What does the Chromosome map show?

Chr 7 map

As with many of my maps, I have different version as I have tried to perfect them. But something looks wrong here. Either the map is wrong or my matches above are wrong. Sharon should have a Frazer match with Jane at 99 to 107, but that is showing as blue which in this case is my non-Frazer Hartley side. I had one other case where one of the Frazers matched on my mother’s side. After lowering the thresholds a bit, I got this match between my non-Frazer mother and Jane:

Chr 7 Jane Gladys+

That means that Jane either matches one of my mother’s ancestors way back or is identical by state or by chance in this area. But what about the match between my sister Heidi and MFA of the Frazer DNA Project? I lowered the thresholds a bit again at Gedmatch and checked to see if MFA also matched my mother.

Chr 7 MFA and Gladys

Oh, my. It seems like everyone is related to everyone! Welcome to the family. Actually, if MFA and Jane were to be related to my mom, it would make more sense on her orange Lentz side (which is where they do indeed match). That is the side where my mom has a grandmother from Sheffield, England. The green side would make less sense at that is primarily German and specifically Germans that lived for many years in a colony in Latvia. Well, at least I don’t have to revise my Chromosome 7 map.

Chromosome 9

I see one lone match between my sister Sharon and my cousin Paul.

Chr 9 Sharon Paul

Chr 8

That makes sense. Sharon is the only one with Chromosome 9 Frazer DNA in my family. As no other Frazers in the Project appear to match here, I can assume that this match is on my McMaster side. Paul and Sharon share a Frazer ancestor that married a McMaster, so half our shared DNA could be on the McMaster side coming down through our respective Frazer lines.

Chromosome 10

Chr 10

Chr 10 Map

Out of curiosity, I checked to see if my sister Sharon would match Paul on the first bar (S) if I lowered the Thresholds. She did between 6 and 9 (top left green segment). Again, this could be McMaster DNA.

Chr 10 Sharon Paul

Chromosome 12

This Chromosome has been discussed before as it is part of a TG.

Chr 12 TG

Chr 12 TG Map

Here are few more [probably McMaster] segments that are matches between cousin Paul and my family:

Chr 12 Paul matches

Chromosome 14

My sister Heidi has a small match with Charlotte of the James Line.

Heidi Charlotte Match

I don’t know if it is a valid match, but it falls in the right area of Heidi’s chromosome.

Chr 14 map

Chromosome 17

Here I have a lone match with MFA

Chr 17

Chr 17 map

Looks like I’m the only hope for Frazer matches in this Chromosome. As the chromosomes get higher in number, they get shorter. The shorter chromosomes have fewer segments and are simpler than the longer lowered numbered chromosomes.

Chromosome 20

Here I am again with Bonnie from the James Line:

Chr 20

I wrote a whole blog on this Chromosome on January 12, 2016.

Chr 20 Map

I have a bit to finish on this Chromosome. Note that Bonnie’s match with me on the bottom bar fits in from 47 to 54. It seemed like Sharon should match Bonnie also. I looked more closely at my spreadsheet and she was there. Here is what gedmatch shows.

Sharon Bonnie

Chromosome 21

My sister Heidi matches Cathy. These 2 also matched at Chromosome 3 above.

Chr 21

Here I have a problem.

Chr 21 map

I have some nice colors but no grandparents named. I don’t have enough cousins that match me on this short Chromosome to identify which grandparent is which. But maybe that’s OK. When I check to see if Cathy matches with Heidi’s paternally phased DNA (that is, her Frazer side) there is no match. Cathy matches Heidi’s maternal, non-Frazer side (or is Identical by Chance).

Heidi Cathy Maternal

So either way, this is not a good match for the Frazer project. However, this is a good thing to know. This does not invalidate the match Cathy did have with Heidi at Chromosome 3.

Chromosome 22 (Last One)

There are just a few small matches in our family with cousin Paul left. They are small, and likely to represent the McMaster side of our ancestors. These McMasters apparently lived parallel lives to the Frazers in bordering County Sligo. Perhaps they came to their particular area of Ireland for the same reasons as the Frazers and stayed or left for the same reasons.
Chr 22

Finally, the last map.

Chr 22 Map


  • I have listed every known Frazer match to myself and my 2 sisters in the Frazer DNA Project
  • These matches were checked against my Chromosome maps to make sure they mapped to the correct Frazer grandparent
  • In some cases, the Frazer matches were found not be Frazer matches at all because they matched my non-Frazer mother
  • One pleasant surprise was finding an additional Triangulation Group at Chromosome 2. This TG was between the 2 main Frazer Lines in the DNA Project: The Archibald and James Lines.
















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