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I thought I had grasped the meaning of triangulation. Until I saw this match in MyHeritage (see below).

What is happening?

It looks like the two segments that have the triangulated match are single segments, but why is the triangulated match not starting at the left of the top segment. Let's say the triangulated segment (part) is on the paternal chromosome.

Is the left part of the top segment on the maternal chromosome, or the left part of the bottom segment?

If so, can any single segment be part paternal, part maternal?

Please help me back on track...

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