とつぜんへんい
mutation, genetic mutation
noun
進化は、突然変異による遺伝子の変化に自然選択が働くことで起こります。
Evolution occurs when natural selection acts on genetic changes caused by mutations.
この種族における突然変異の発生率は、放射線の影響を受けています。
The mutation rate in this species is affected by radiation exposure.
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