In many cases, Persian, Turkish or Afghan men came to sub-continent and married local women here. So it is revealed in studies done for many Indain Muslims that their Y chromosomes traces to Arabia or Persia and their mitochondrial DNA traces to sub-continent.
Yes, thats what happened -they initially came from the caucases, then to these areas, and then to the Indian subcontinent.
Mitochondrial DNAs are from maternal side. Say I get it from my mother, she gets from her. Your kid's wont have your mitochondrial but your wifes.
My ancestors always married from the same group of villages so I assumed it was a closed genetic group, so they would be the same. Thats what HenriMonier said earlier in this thread, so I decided not to..