X-chromosome Section Two of Mary (Mygatt) Whittlesey's descendants share a 33cM section of their X-chromosome. This shared segment of DNA is presumed to be inherited from Mary.
yDNA Haplogroup Q-F1680 (Probably) +L245 +M378 +L275 +L232 + M242 David Howard and Jeff Horwitz have have their yDNA tested and we are both are in Haplogroup Q which probably evolved in Siberia about 20,000 years ago. About 4% of Northern European Jewish (Ashkenazim) men are in this group. Only Jewish men appear to have markers +L245 and +F1680. So far not many other Horwitz families have this marker. There is a lot of speculation how this got into the Jewish family. Only Jewish men have this marker in the Northern European population.
