Central Arkansas Veterans Healthcare System 1 article published in JoVE Genetics Detection of Inter-chromosomal Stable Aberrations by Multiple Fluorescence In Situ Hybridization (mFISH) and Spectral Karyotyping (SKY) in Irradiated Mice Rupak Pathak1, Igor Koturbash2, Martin Hauer-Jensen1,3 1Division of Radiation Health, Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, 2Department of Environmental Health, Fay W. Boozman School of Public Health, University of Arkansas for Medical Sciences, 3Surgical Service, Central Arkansas Veterans Healthcare System The present protocol describes the usefulness of multiple fluorescence in situ hybridization (mFISH) and spectral karyotyping (SKY) in identifying inter-chromosomal stable aberrations in the bone marrow cells of mice after exposure to total body irradiation.