clastogenesis

https://doi.org/10.1351/goldbook.15566
Formation (or generation) of chromosomal breaks and (or) consequent gain, loss, or rearrangement of pieces of chromosomes.
Source:
PAC, 2007, 79, 1153. (Glossary of terms used in toxicology, 2nd edition (IUPAC Recommendations 2007)) on page 1191 [Terms] [Paper]