The maternal relationship between Sarah Ann Phillips and her daughter
Mary Francis Williams is confirmed by the direct inheritance path of autosomal DNA down to their DNA tested descendant PET.
The segmental (via DNA segment triangulation) and total DNA shared between PET and other confirmed descendants of
John Phillips is consistent with the expected ranges for their respective relationships. Since PET descends from John Phillips through Sarah Ann Phillips and her daughter Mary Francis Williams, the presence of significant shared DNA between PET and other known descendants of John Phillips validates the generational links along this maternal line.
This supports the conclusion that DNA was passed from MRCA John Phillips through Sarah Ann Phillips to Mary Francis Williams, and ultimately to PET, confirming this direct ancestral connection through multiple generations.