In Common With Inconsistency

[djknox]

thanks. Actually, not only do you need to clear out the applied filter, but you must then return to the full match list before selecting ICW. Not a great design... but I seem to have it working better now.

[djknox]

I've got 3 kits that I match on Chromosome 1 with all segment sizes >10cM. Matrix indicates that everyone matches with everyone. When I use the IN COMMON WITH utility, I get different results:

ICW kit 2 returns kit 3
ICW kit 3 returns no kits
ICW kit 4 returns 3 names,...

[djknox]

Thanks guys for your insights. I actually have my mother, two siblings and my father's sister tested... so i'm trying to figure out how to identify what segments are from my father... and how to begin reconstructing his atDNA. Ill spend some more time on this and come back if things still aren't clear....

[djknox]

Thanks KM, that makes sense and clarifies half of my confusion. I forgot that each chromosome is actually a pair. But when I compare against a distant cousin who is related via both my maternal & paternal lines, which chromosome is selected for comparison, my maternal or my paternal? I don't...

[djknox]

Can anyone explain why the chromosome browser shows 100% common DNA between a parent and a child? Should a child not have approx. 50% matching DNA? I was hoping to see that the 50% of my atDNA not matching my mother would therefore be inherited from my father? What's going on?

[djknox]

thanks. I did the first two steps but not the 3rd as it seemed a bit onerous at the time. Will re-investigate.

[djknox]

Mattn I think you answered your own question. Telling me that small segments are not valid is just repeating dogma. This is the advanced topic administrator forum. I'm looking for insight... so maybe you can provide hard proof for your dogma? Look, FTDNA already has the chromosome browser tool, so...

[djknox]

I've been H* for years. When do I get further haplogroup classification?

[djknox]

I would like to compare any FF results in a Chromosome Browser... not just FF matches >20cM. Small segments are not all IBS and could be the door to real genetic genealogy... ie investigating our ancestors who lived before the 1800s.

The tool already exists. Please make it more...

[djknox]

So Mattn, if I have a group of 20 individuals who all share the same paper trail back to a couple living in the 1700s, would matching segments < 7cM between multiple members of that group be "mostly not valid?" Sorry but I don't need regurgitation of dogma, I want tools to undertake meaningful...

[djknox]

And by the way, it is really becoming tiring to hear that every useful analysis that one would could imagine or want to do TO ACTUALLY GLEAN SOME VALUE FROM GENETIC GENEALOGY TESTING has to be done outside of FTDNA. STR testing offers little unless off-modal analysis is performed elsewhere from FTDNA,...

[djknox]

The issue with small segments is also context. If FTDNA wants to create a threshold for atDNA matching, that is practical. But in my case, I have 20 individuals who all have the same ancestor pair who were born in the mid 1700s. I would like to compare their atDNA segments of all sizes to see what...

[djknox]

I manage a private project that is analyzing a group of diverse people who all have paper trails back to a common ancestor couple living in the late 1700s.

Many of the members do not match each other based on the FF threshold criteria... but some do. I would like to view members in a...

[djknox]

Jack, i'm afraid that I am not entirely following your arguments. Are you saying that you have specifically identified numerous small segments that are attributable to some Mr. Green who had more than his fair share of tail in the 18th century colonial USA? How do you know these small segments belong...

[djknox]

Wow this Mr. Green sounds like a great guy to have as an ancestor

The topic about small segment matching may be misunderstood at times. It is my understanding that segments >10cM are almost never IBS, while segments between 7cM and 10cM are mostly not IBS. Below 7cM the likely...