Missing Y-DNA Haplogroup

[glmorley]

When viewing Y-DNA Matches, you are presented with six columns of information (from left to right):

Genetic Distance
Name
Most Distant Ancestor
Y-DNA Haplogroup
Terminal SNP
Match Date

I've noticed that the Y-DNA Haplogroup is blank for all matches, except those who have Terminal SNP results. Does anyone know why?

Regards,

Gregory L. Morley, M.A.
Group Administrator
SAYRE Family DNA Project