Visual Phasing My Two Children with the Fox Spreadsheet: Part 3

In Part Three of this series, I will be looking at Chromosomes 13-18 for my children and visually phasing them to the extent that I can.

Chromosome 13

Here, Heather gets a full dose of her Rathfelder Grandmother’s DNA:

I didn’t see any of the Jarek-matching DNA on the Fox Spreadsheet. I don’t have to open JJ’s FTDNA account each time for his Cavanaugh side match Martha as I aready downloaded JJ’s segments:

Here is where Heather matches Martha:

That takes care of the right half of Chromosome 13:

Heather has this maternal match with Pavel that JJ does not:

It is small, but likely to be real as it is a phased match. This appears to be the correct solution for Heather and JJ’s Chromosome 13:

Chromosome 14

Here is what Heather and JJ’s paternal side looks like:

Heather has a small DNA match with Robert that JJ doesn’t have on the Jarek side:

That is enough to map the left side of Chromosome 14:

The maternal side DNA can move over two lines as those are taken up by paternal crossovers.

Heather matches Peter, a Jarek-side matche, here:

Here is JJ’s match with Peter at FTDNA:

This indicates to me that JJ has a crossover to Jarek at about position 70:

Next, I need to get the position number for the right side of the green FIR.

This is at about 96.6.

JJ has a maternal match with Ashley that goes to about 98:

Heather’s matches do not go that far, so I would give the crossover to Heather:

Other than to JJ, Heather’s furthest out math is at 91.

Chromosome 15

Let’s see how Chromosome 15 shakes out for Heather and JJ:

This shows that Chromosome 15 only has two crossovers and one of those is on the paternal side. It also shows that JJ got a full dose of Rathfelder DNA on his paternal side. Heather and JJ’s match with Jarek-side match Robert shows where the other crossover is:

Here is the finished, simple Chromosome 15:

This tells me that if I was looking for Cavanaugh matches on this Chromosome, I should look at Heather’s match list and not JJ’s.

A Further Check on Chromosome 15

I show that Heather has a match with Jarek-side LeeAnne here:


I had assumed that LeeAnne was on the Jarek side, so something seems wrong. Perhaps LeeAnne is on the Cavanaugh side. When I check on LeeAnne’s tree at Ancestry, I assumed that the Dziura in her family was the Dziuria in my children’s family:

That could mean that LeeAnne could match on the Cavanaugh side? Very confusing. However, LeeAnne’s shared matches at AncestryDNA are clearly on the Jarek side. The only explanation that I can think of is that Heather and JJ have a crossover at nearly the same poine where (going from right to left) JJ goes from Jarek to Cavanaugh and Heather goes from Cavanaugh to Jarek.

Checking Martha on the Cavanaugh Side

I see that JJ matches Martha here:

This confirms that at some point on the left side of Chromosome 15, JJ needs to have Cavanaugh DNA and Heather has to have Jarek DNA, but I can’t figure out where that is.

One More Check

When I check on Heather compared to JJ at Gedmatch with a lower match limit of 3 cM, I get this:

These are just two small matches at the beginning of the Chromosome. These two small matches may or may not be important. I’m tempted to think that Heather and JJ had maternal crossovers at about the same point:

I don’t know where that point was, but it must have been after position 54.3. Here are Heather’s maternal matches:

The crossover is likely between 55 and 60.8. based on Heather’s maternal matches.

Chromosome 16

I hope that this Chromosome goes more smoothly than the last one:

I don’t see any uploaded Jarek matches on the spreadsheet. I have used Peter before as a Jarek side match:

That gets things started on the maternal side:

The 55 above is closer to 54.8. That is cutting it close, but JJ has this maternal match:

Heather’s match with KP ends slightly sooner:

So I will give Heather the crossover at 54.8:

JJ has many matches going through 82, so I will give the crossover to Heather again:

I couldn’t find a clear answer to the two segments on the left of Chromosome 16:

Chromosome 17

Here Heather gets a full dose of Hartley DNA from my father:

 

A match with Robert on the Jarek side shows that Heather has the first maternal crossover from Jarek to Cavanaugh:

 

JJ matches Cavanaugh side Martha here:

That means that Heather must match on the Jarek side in that area:

A Little Detective Work to Fill in the Last Part of Chromosome 17

I noticed that on Heather’s list of matches from FTDNA, she has one with a Polish sounding last name:

The match goes through positiion 72.7. I need to know if this is a paternal or maternal match for Heather. I checked Heather’s in common matches at FTDNA and did not see any paternal matches. That tells me that this match is likely on Heather’s maternal side. From what I can tell, this is the right answer for Heather and JJ’s Chromosome 17:

Chromosome 18

I’lll conclude this Blog with Chromosome 18:

This project would have been much more difficult without my mother’s Rathfelder DNA.

Jarek Cousin Robert has a match that goes to position 53:

The match looks like it goes over the crossover line, but I don’t trust the accuracy of it.

Cavanaugh Cousin Martha matches Heather here:

There were no obvious snags in Chromosome 18:

This would be a good Chromosome to look for Cavanaugh side matches – especially on Heather’s side.

Summary and Conclusions

  • It looks like I was able to finish the visual phasing for each of Chromosomes 13-18
  • The smaller higher number chromosomes are generally considered easier to visually phase compared to the longer chromosomes
  • I find it interesting that when I passed my DNA on to my children, I was really passing down my parents DNA to them and combined my children recieved the DNA from their four grandparents.

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