Schematized gene expression profiles from different cell types. The curves describes the profile of a gene expressed in the given cell type as observed after irradiation with 1 Gy. Above descriptions of the main cellular events is outlined. The relative intensity of expression signal cannot be compared between cell types and will in addition depend on how abundant the transcripts in question are expressed, while the relative profile should fit if expression is confined to the cell type described. The signal from spermatocytes originates primarily from large pachytene spermatocytes, which has a tremendous effect on the expression signal observed from other cell types.