Wednesday, 12 October 2016

Chromosome Map review

Time to see if I'm progressing.

"Progress" here is defined as having formed all my segment matches into groups, and hopefully assigned to a "side".
This assignment is either directly because of a match to a known relative at the same position on a chromosome, or by deduction via a lack of a match to the known relative, at the same position with the smaller segment matches checked at where possible.

Last review was back on the 8th  of January (see "How far have I got?"), which chromosome map took all segments of whatever size (usually down to 10cMs).
This time I restricted myself to those 12cMs and above - on left - with the Jan 2016 version on the right
Lorna's Paternal/Maternal chromosome map, Oct 2016
Lorna's Maternal/Paternal segments, Jan 2016

So why am I doing this (I need to remind myself of this every so often!)?
To find those segments that I (or my other tested cousins) potentially inherited from the brickwall ancestors* that got me/us into DNA testing in the first place.
That pretty picture has yet to be produced, but those are the segments I should be focussing on to work with the matches at those spots to find any commonality for hints as to further research into  potential connections.

* the main brickwall ancestors are listed on the 8th January post linked above

There's a very satisfying decrease in the yellow ungrouped, Group A and Group B segments, primarily because of an increase in tested relatives who are starting to pop out of the woodwork faster than I can keep up these days.
The yellow bits are generally singletons - no other matches at the spots concerned to be compared against, but large enough not to be Identical by State (IBS) aka simple coincidental arrangements of DNA that "matches".
The latter two (A and B) are those matches that have been able to be grouped into segments definitely sharing a common ancestor, somewhere/somewhen, but with no ability to compare against known relatives at that spot.
This could be either because none of the known relatives match at that spot, or because different testing companies were involved with no ability to compare at

If you have tested autosomal DNA at any of FamilyTreeDNA (their FamilyFinder test), or Ancestry or 23andme, PLEASE consider maximising your investment in DNA testing by uploading your resulting file to
It has a wonderful range of tools and gives us all the ability to run comparisons to find matches tested at the other companies. All of which helps all of us find our shared ancestry.

Tuesday, 11 October 2016


Sorry folks.
Some of you may have noticed either this:

or this:

when you tried to access items like my Lorna's Links, Contact me, workshop notes, and assorted other pages over the last few days.

Will try harder next time I try something out behind the scenes and NOT accidentally stray into the production site instead!