The present disclosure relates to methods for determining recombination diversity at a genomic locus of interest. The method includes fragmenting nucleic acids isolated from immune cells, ligating adaptors to the fragmented or amplified nucleic acids, and selectively amplifying nucleic acids containing a recombined junction at the genomic locus of interest. Selective amplification is achieved by using a first primer that hybridizes to an adaptor sequence and a second primer that hybridizes at a constant region downstream of the recombined junction. The selectively amplified nucleic acids may be sequences and analyzed to determine recombination diversity at the genomic locus.