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Visual phasing

From ISOGG Wiki

Visual phasing is a methodology for assigning segments to specific grandparents based on the crossover points of three siblings. This technique can be employed when parents are not available for testing. The methodology was developed by ISOGG member Kathy Johnston. The details of the methodology can be downloaded in a PDF file from the FTDNA Forums (registered users only).

Blog posts

The methodology has been demonstrated by a number of genetic genealogists in a series of blog posts:

Videos

See also