Cytogenetics
（重定向自Cytological map）
![A metaphase cell positive for the BCR/ABL rearrangement using FISH](/Images/godic/202501/07/Bcrablmet2558.jpg")
![Philadelphia translocation t(9;22)(q34;q11.2) seen in chronic myelogenous leukemia.](/Images/godic/202501/07/T922_CML2559.jpg")
![Human male karyotype.](/Images/godic/202501/07/NHGRI_human_male_karyotype2559.png")
![Interphase cells positive for a t(9;22) rearrangement](/Images/godic/202501/07/Bcrablinter2559.jpg")
Cytogenetics is a branch of genetics that is concerned with the study of the structure and function of the cell, especially the chromosomes. It includes routine analysis of G-banded chromosomes, other cytogenetic banding techniques, as well as molecular cytogenetics such as fluorescent in situ hybridization (FISH) and comparative genomic hybridization (CGH).