染色 せんしょく たい突然 とつぜん変異 へんいじゃなかったです
senshokutai totsuzenhen'ijanakattadesu

Noun
Desu Copula

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

1. Wasn't a chromosomal mutation.

Past/Perfective
Negative
Polite
Casual Register
Genetics
Medicine