experiments in which cells were examined at various times after exposure to the x-rays showed that this phenomenon , termed an adaptive response to the endogenous radiation from tritium , is not an artefact caused by radiation-induced mitotic delays , which could result in the sampling of metaphase cells that were irradiated in different parts of the g2 phase of the cell cycle , where sensitivity to x-rays changes dramatically .
C0025564
metaphase
C0007634
cells