Hello Shweta,

please find a link below for your query.These are some colleges in TN offering courses in the genetic engg. 

https://targetstudy.com/colleges/btech-genetic-engineering-degree-colleges-in-tamil-nadu.html

All the best

Shubham goel

Dear Shwetha
As you required the information regarding the genetic engineering,  my team combined the entire information regarding that colleges with rating and also based on the infrastructure,  placements etc..,  in a detailed manner in a web page. 
Here you can go through that link:
GENETIC ENGINEERING
do comment here,  if you have more doubts.
All the best.