<prompt> BCR-ABL fusion gene is detected by?Flow cytometryFISHKaryotypingRT-PCR  <response>: Ans. b FISHRef: Robbins 9thpg 616-618Flow cytometry: is used for immunophenotyping in Leukemias LymphomasFISH- used for detecting submicroscopic chromosomal aberrations of BCR-ABL fusionKaryotyping: Used for detecting chromosomal defects of at least 5 mb size low sensitivityRT-PCR: used for quantitative DNA estimation 