2025 biology talkshow : 基因的小瑕疵,可能的大傷害! 點突變與框移突變 (選修生物I)

討論兩種常見的基因突變類型：點突變與框移突變，並解釋即使是微小的DNA序列改變也可能對蛋白質結構與功能造成重大影響。詳細介紹點突變根據對密碼子的影響，可分為沉默突變、錯義突變和無義突變，並以鐮刀型貧血症為例說明錯義突變的後果。相較之下，框移突變因非三的倍數的插入或刪除，會導致整個閱讀框錯位，進而產生無功能甚至有毒性的蛋白質，並列舉了泰-薩克斯病、囊性纖維化和杜氏肌肉萎縮症等案例。理解這兩類突變對於遺傳學研究、疾病診斷與治療策略的設計至關重要，尤其在精準醫療與基因編輯等領域具有關鍵價值。 Powered by Firstory Hosting

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2025 biology talkshow : 基因的小瑕疵,可能的大傷害! 點突變與框移突變 (選修生物I)

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