noun
spontaneous mutation
Technical genetics term for a mutation that occurs naturally, without artificial induction.
自然突然変異は進化の原動力の一つと考えられている。
Spontaneous mutation is considered one of the driving forces of evolution.
この実験では、自然突然変異と誘発突然変異を比較した。
In this experiment, we compared spontaneous mutations and induced mutations.
Compound of 自然 (natural) + 突然変異 (mutation). The exact historical derivation is uncertain, but the term follows standard scientific naming patterns.