South Asia is one of the most diverse places on earth, with many hundreds of languages, reflecting great human diversity, and there is great genetic diversity as well. One of the
3/ things that we see when we look at genetic data from diverse people in India is that the great majority of groups in India, but by no means all groups, speak Indo-European and Dravidian languages. These are the two largest language families in India, and which are genetically
4/ well described as being arrayed on a gradient of different proportions of ancestry, different proportions of inheritance, from two very different ancestral populations, as different from each other as Europeans and East Asians. We have known for 11 years in India with this
5/ gradient of different proportions of these two highly divergent ancestries.

This came out of the work that we did in collaboration with K. Thangaraj in Hyderabad’s Centre for Cellular and Molecular Biology [CCMB]. We spent a lot of time over the past decade, trying to
6/ understand the origin of this major gradient of ancestry in South Asia that accounts for almost all of the ancestry in people speaking Indo-European and Dravidian languages, but does not account for unique and special ancestry that is common in people speaking Austro-Asiatic
7/ and Burmese languages. So most of the work we have done is focussed on that gradient. I’m happy to tell you what we have learned in the last decade about the origin of that group.

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More from @RavikanthS_

23 Sep
Open Letter to

23rd September 2020.

Dr. Rajan Sharma,
Indian Medical Association,
IMA House, Indraprasth Marg,
New Delhi
110 002

Dear Dr. Rajan Sharma,
It is with extreme distress that citizens like me note the very high death rate among doctors attending to patients in the current pandemic situation.

As per media reports and a statement attributed to your association about 382 doctors have lost their lives. I am sure
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👆 Wadekar was an excellent captain but he never won a World Cup.

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Read 9 tweets
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Modi regime and perceptions about whose interests it most cares about.

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1/ 007


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21 Sep
From the wall of Musa Sayyed;

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