融合基因(英語:Fusion gene)是指兩個基因的全部或一部分的序列相互融合為一個新的基因的過程,屬於結構變異的一種情況,其有可能是染色體易位中間缺失染色體倒置所致的結果。

顯示融合基因在染色體水平上形成方式的示意圖

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