The paternal relationship between John Chapman and his son
James Chapman is confirmed by the direct inheritance path of autosomal DNA down to their DNA tested descendant DC.
The segmental (via DNA segment triangulation) and total DNA shared between DC and other confirmed descendants of
Robert III Chapman/
Elizabeth Leah Taylor is consistent with the expected ranges for their respective relationships. Since DC descends from Robert III Chapman/Elizabeth Leah Taylor through John Chapman and his son James Chapman, the presence of significant shared DNA between DC and other known descendants of Robert III Chapman/Elizabeth Leah Taylor validates the generational links along this paternal line.
This supports the conclusion that DNA was passed from MRCA couple Robert III Chapman/Elizabeth Leah Taylor through John Chapman to James Chapman, and ultimately to DC, confirming this direct ancestral connection through multiple generations.