刪除(英語:Deletion)在遺傳學中有時也稱為刪除突變或微刪除,指染色體或DNA序列的一部分發生缺失,進而失去這些遺傳物質。刪除的程度不一,可能是單一鹼基對,也可能是整個染色體[1]。此種作用可於減數分裂中,染色體互換時產生,是某些遺傳疾病的成因。
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