Is there any accepted calculation of the minimum number of siblings needed to test in order to fully reconstruct the genome of a parent? My best guess is 3, but that's just based on one observation of siblings whose phased kits at Gedmatch show ~2k shared paternal cM.

Also a tangential thought: Is there a significant difference in the volume of shared cM for identical twins vs. any other type of siblings?

Also a tangential thought: Is there a significant difference in the volume of shared cM for identical twins vs. any other type of siblings?

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