Chromosome Browser -can it identify parental sides

[Essnell]

  Hi  Rootschatters, 
 Hope this is understandable :-

I am using the Chromosome browser in My Heritage.   I have a lot of matches to one section of the family line relating to my Grandmother's sister.  That's all Ok.
I have a number of these that seem to be related but do not Triangulate with each other.
Sometimes with one member seperately but not together.
Yet the Segments are in the same position on the seperate gray lines [ the chromosomes].

this must indicate something about the relationship but what .
Is it telling me that each has inherited this identical piece but from a different source. 

Maybe more distant than the other. 

for example:  I have Jack Brown  with a 10 cM seg on Ch 6   at point  dddd
                        And Dora Smith   with a 10 cM seg on Ch 6   at point  dddd    but they don't Triangulate.

Any ideas as there a loads of these in the mix.

Essnell

[CorleyMiller]

Hello,

I had what seems to be a similar issue and contacted MH for some guidance

This is my original query:

Triangulation Query
I have 3 DNA matches that share the same segment on my chromosome
5, let’s call them A, B & C. Segments sizes are 18.7cM, 14.7cM and 13.8cM
respectively.
A is a proven maternal match.
B and C are mother and child and triangulation between them is indicated
in the chromosome browser.
A and B also triangulate therefore B is also maternal and will share a
common ancestor with A.
However, A and C together on their own in the chromosome browser do
not triangulate and C does not appear in the shared matches of A.
How can this be?


Their response was:

'C is the child of a match, it probably hasn't reached the threshold, to be recognized.
this Is further corroborated by the fact that A triangulates B and B and C triangulate,
but A and C do not.
C would only share one half with A, that is the part of B (your mother) since dies first
is a match at a certain distance, it just doesn't have the threshold of Multiple shared
DNA achieved to have triangulated segments.
This is also because we don't test the entire genomes, we only test 700,000 SNPs,
the more distant relationships are not always reliably displayed. This is one of the
reasons why we include medium and low confidence tags in some Matches. (usually
more distant ones).'


Whilst I didn't fully understand their response, my interpretation was basically, small matches can be unreliable.

Regards

[Biggles50]

Try using the Auto Cluster DNA tool in My Heritage.

Download the results and view the resulting chart to see how the matches clustered.

Maybe there will be a name in a cluster who you have already linked to in your family tree