According to me if you want to study genetics first of all read the whole chapter from NCERT , try to understand the basic points, and now to get detailed analysis of those basic points plus some other relevant topics not present in NCERT refer to your coaching module. I had aakash module and it was very helpful with exhaustive theory. Genetics is a conceptual chapter so you would need to study it many times to get the concepts crystal clear.
for revision i would recomend Allen module as it have important points in short and few formulas which are very helpful. Take a light reading always before going to class because it will help you understand genetics better.
for questions after reading NCERT and module first focus on previous year NEET as well as AIIMS questions then move on to your module and extra book questions.