Hi ramasamy,

Firstly congrats as you have decided to opt for genetics as a field of study , its really a complete set of career field . For genetics you may required some prior knowledge to biology. For Genetics study i will suggest you to go for higher studies and try it from some IITs. 

Coming to your question i have shortlisted top genetics b.sc colleges for you , you have to visit here official website and apply there : BANGALORE UNIVERSITY,GNDU - Guru Nanak Dev University,Jain university,The oxford college of science,Guru Nanak Institute of Pharmaceutical Science and Technology,AIMS Institutes.

All the best ,hope it will help you. FOR MORE QUERY COMMENT BELOW AND UPVOTE :)