Potentially lots of different things, depending on how you want to define it, I guess. Things like bioinformatics would be applicable (which, in this context, would involve working with technology to multiply/analyze DNA sequences and interpreting the results with a computer), also genomics and gene therapy (where chosen genes can be transported into an organisms DNA to allow for extra, desired functions).
These are broad topics, to give a better answer it would help to know: what is the reason/context for/of your interest?