遺伝 いでん 突然 とつぜん変異 へんいじゃありませんでした
idenshitotsuzenhen'ijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 遺伝子突然変異

1. Was not a gene mutation.; Did not mutate.

Past/Perfective
Negative
Polite
Terminal Form
Genetics