Interesting. I was taught in school that India at one time was subjugated and dominated by Caucasian invaders. I would have though a bit more 'Steppe Aryan' in there.
It depends a lot on whether you are looking at the whole chromosome or just at the Y chromosome (inherited from men only). The term for a group defined by half of the human chromosome is "haplogroup". You can use it when speaking of Y, inherited from men, or the mitochondrial DNA in every cell, which is inherited from women.
Indian men mostly in the R1a haplogroup, which is very similar to most of Europe, especially Eastern Europe. Most of Western Europe is in the R1b haplogroup, which is of course very similar to R1a.
But the Muslim invaders in India were mostly of the J haplogroup, not R.
Then again, the R haplogroup was introduced a few thousand years before the Muslim invaders with the Aryan invaders.
The main point is that the invaders tend to rape the women, or take them for wives, and so the invaded culture tends to remain what it was on the maternal side, but to take on the invaders' genes on the paternal side.
The same thing is true in many places. For example, in Latin America, almost all the men have Spanish R-group Y chromosomes, but the maternal lineage is the native Indians (American Indians).
And yes, the women generally did not move with the invading army, but stayed where they were born. So maternal genes did not move as far or as quickly.
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Indian men mostly in the R1a haplogroup, which is very similar to most of Europe, especially Eastern Europe. Most of Western Europe is in the R1b haplogroup, which is of course very similar to R1a.
But the Muslim invaders in India were mostly of the J haplogroup, not R.
Then again, the R haplogroup was introduced a few thousand years before the Muslim invaders with the Aryan invaders.
The same thing is true in many places. For example, in Latin America, almost all the men have Spanish R-group Y chromosomes, but the maternal lineage is the native Indians (American Indians).
And yes, the women generally did not move with the invading army, but stayed where they were born. So maternal genes did not move as far or as quickly.
https://en.wikipedia.org/wiki/Y-DNA_haplogroups_in_populations_of_South_Asia
But the largest single groups are like this:
native Indian men: H
descendants of Muslim invaders: J
descendants of Aryan invaders: R