<prompt> HLA is present on-Sho term of chromosomes 3Sho arm of chromosomes 6Long arm of chromosomes 3Chromosome 15  <response>: Reference :Robbins basic pathology 9th edition pg no 102 :loci named HLA A,HLA B and HLA C.Each of these molecules it;s a hetero dimer consisting of polymorphic 44kDa alpha chain noncovalently associated with an invariant 12 kDa beta2 microglobulin polypeptide encoded by a separate gene on chromosome 15 