染色 せんしょく たい突然 とつぜん変異 へんいじゃありませんでした
senshokutai totsuzenhen'ijārimasendeshita

Noun
Desu Copula

The polite, past negative form of 染色体突然変異

1. Was not a chromosomal mutation.

Past/Perfective
Negative
Polite
Terminal Form
Genetics
Medicine