DNA study confirms that Oliver N. Buell and Mosiah Hancock were not Joseph's sons.
Ugo A. Perego, Jayne E. Ekins and Scott R. Woodward, "Resolving the Paternities of Oliver N. Buell and Mosiah L. Hancock through DNA," The John Whitmer Historical Association Journal 28 (2008): 135-136
The genetic data collected from descendants of Oliver N. Buell and Mosiah L. Hancock and the genetic profiles available in the searchable Sorenson Molecular Genealogy Foundation Yes database revealed that it is highly unlikely that the prophet Joseph Smith was the biological father of either Oliver Buell or Mosiah Hancock. Furthermore, the genetic evidence seems to confirm that both individuals were born from the man that has been recorded as their father (Norman Buell and Levi Hancock respectively).