新生 しんせい突然 とつぜん変異 へんいでしょう
shinseitotsuzenhen'ideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 新生突然変異

1. Probably a new mutation.; Likely a spontaneous mutation.

Polite
Presumptive
Conjecture
Genetics