In my opinion and to the best of my knowledge, you should select Physics, Chemistry and Mathematics in order to pursue Genetic Engineering
after completing your higher secondary.The procedure to become a genetic engineer can be explained as follows:
Firstly you should opt for science stream in your 11th standard and then you should try to learn all the basic concepts of science stream.
This would greatly help you in making a great career.After that you should concentrate on your higher secondary.This class is much more
important then the prior one, and you should be much more careful about the concepts as they are some of the most important ones.
If you want to take admission in a very good engineering college, then you would have to appear for various engineering entrance
exams for example- IIT JEE, AIEEE, etc.On the basis of score obtained by you in these exams, you would be allotted a college.