http://members.tripod.com/~tanmoy/bengal/races.html
Thus they find that the haplogroups H* and its subclades H1*, H1c, H1a and H2 form the most common (26.4%) haplogroup in their Indian sample followed by R1a1-M17 (15.8%), O2a-M95 (14.6%), R2-M124 (9.3%), J2-M172 (9.1%), O3e-M134 (8.0%), L1-M76 (6.3%), F*-M89 (5.2%) and others accounting for the rest 4.2%. Geographically, India lies between Pakistan (where they found R1a1-M17 which is predominant (24.4%), followed by L*-M20 (13.1%), J2-M172 (11.9%), R2-M124 (7.4%), R1b-P25 (7.4%), G-M201 (6.3%), C3-M217 (6.8%), H*-M69 (6.3%), L1-M76 (5.1%), and others, each less than 5%, accounting for the rest rest 16.4%) and East Asia (where O3e-M134 (15.4%), C3-M217(13.1%), N3-TAT (12.0%), O2a-M95 (10.9%), O3-M122(xO3e) (11%), N-M231(xN3) (6.3%) and R1b2-M73 (6.3%) are more than 5% and account for 75.4%). It is, however, in the study of diversity and divergence times that there are hints of disagreement with the standard model. The prevalence and diversity of H1, R1a1, and the R2 haplogroups peak in different regions. Overall, the Indoeuropean speaking groups are more similar to the Pakistani populations than to the East Asian populations, and than the Dravidian, Tibeto-Burman, and Austro-asiatic groups are to the Pakistani population. As to the origin of the haplotypes, they note that C5-M356, F*-M89, H*-M69 (including H1-M52 and H2-APT), R2-M124 and L1-M76 probably arose in India, and F*-M89 and H*-M69 may have shared demographic history. Similarly, J2a-M410 and J2b-M12 probably came through the Indus valley, whereas O2a-M95 and O3e-M134 came from SE Asia, the former probably through Orissa.
Here is a link to a study conducted by Dr. A Q Khan Labs in Pakistan:
Y-Chromosomal DNA Variation in Pakistan. Am. J. Hum. Genet. 70:1107 1124, 2002.
If the link doesnt work go to
http://www.historicalgenetics.com/articles.html and look for Y chromosome DNA variation in Pakistan in 2002.
I think the geneticists might be focusing on the fact that the Pathan population is also composed of the same haplogroups found among the greater Indian population and missing the same key Mediterranean European, Middle/ Near Eastern and North African haplogroups (E3b, J1 and J2) that the general Indian population is missing. This would suggest that the Pathan population may have come about at the same time as the Indian population, i.e. prior to E3b, J1 and J2 populations joining the R haplogroup population.
regards,
bob