noun
mutagenicity
Technical term used in genetics, toxicology, and related fields to describe the ability of an agent to cause genetic mutations.
この化学物質には変異原性があると報告されている。
This chemical substance has been reported to have mutagenicity.
変異原 refers to a mutagen (the agent itself), while 変異原性 refers to the property of being mutagenic.
Compound of 変異 (へんい, 'mutation') + 原 (げん, 'source') + 性 (せい, 'property'), literally 'mutation-source property'. A modern technical coinage.