I feel like I’m getting near the end of this series. So far, I have been able to solve the first 18 Chromosomes plus the X Chromosome.
Chromosome 19
Here is my first cut at crossover lines assigned to me and my five siblings:
The crossovers seemed straightforward. Actually, I think that there is an additional crossover for Jon (F) at the very end.
Adding Position Numbers to the Crossovers
Next I add the position numbers to the crossovers:
I didn’t have any easy position answer for the first and last crossovers. I could get this from Gedmatch.
Cousin Matches
I hope that I have enough cousin matches to solve Chromosome 19. I need at least one paternal match and one maternal match to solve the Chromosome. It looks like I should have one of each, so that is good. One of the best cousin matches is with Rathfelder cousin Anita:
This is a conservative rendition of her match. Jim, Jon and Sharon will also have Lentz DNA where they do not match Anita (in the area where Anita matches Heidi).
Here is Hartley cousin James’ matches with my family:
This may be enough to solve Chromosome 19:
Note that Jon and Sharon have a HIR for most of the Chromosome:
This is true except for the very ends of the Chromosome where Sharon has a crossover on the left and Jon has one on the right. Here is how that works out:
To be HIR, that means that two siblings have the same DNA from one grandparent and that they have different grandparent DNA on the other side. It turns out that Sharon and Jon share the same Lentz DNA but Jon has Hartley DNA and Sharon has Frazer DNA on the paternal side.
I got this far:
I don’t think that Jon really has a crossover on the right. Here is a close-up of the comparison of Jon (F) and Sharon on the right side of the Chromosome:
Jon and Sharon were HIR for most of the Chromosome. If Jon has a crossover, then their comparison would have to to either FIR or NIR. If this is a NIR, then I should see some red and I don’t. Now, I’m changing my mind back. Perhaps Jon does has a small FIR. If Jon has a Fully Identical Region with Sharon, then he would have a HIR with his other siblings:
The F & S comparison looks greener on the end compared to the other F comparisons.
This image doesn’t give enough detail to see the small crossovers, but shows that overall, I had the right idea with the visual phasing:
Summary and Conclusions
- Heidi had a full Frazer Chromosome.
- Jon and Sharon both had a full Lentz Chromosome.
- Jon either had a full Hartley Chromosome or nearly full Hartley Chromosome.
- I spent some time figuring out whether or not Jon had a crossover near the end. It was a judgement call and amounts to bug dust as it is such a small inconsequential piece of DNA.
- Anita was our only maternal match, so she was very important for the solving of this Chromosome.