2025 bilogy talkshow : 基因的遊牧民族-跳躍基因 Transposable Elements ( 選修生物4) episode artwork

EPISODE · Jul 22, 2025 · 10 MIN

2025 bilogy talkshow : 基因的遊牧民族-跳躍基因 Transposable Elements ( 選修生物4)

from 雷比特生物空中講 · host 雷比特老師

深入闡述「跳躍基因」(Transposable Elements, TEs)的雙重身分及其在基因組中的重要性。首先介紹跳躍基因能夠在DNA鏈上移動的特性,顛覆基因組穩定不變的傳統觀念,並指明其在人類基因組中佔據了近半的序列。接著,回顧芭芭拉·麥克林托克對玉米斑點的開創性發現,揭示跳躍基因的存在,以及她因此獲得諾貝爾獎的歷程。還詳述了兩種主要的跳躍模式:「複製貼上」和「剪下貼上」,並進一步探討跳躍基因作為演化加速器和基因調控網絡「建築師」的正面影響,例如創造新基因、擴展基因家族及提供演化可塑性。然而,文本也強調了跳躍基因可能導致遺傳疾病和癌症的潛在危害。最後總結宿主細胞與跳躍基因之間從對抗到「馴化」共生的漫長演化歷程,例如胎盤形成中關鍵基因「合胞素」的案例,彰顯它們在生命複雜性發展中的關鍵作用。 Powered by Firstory Hosting

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2025 bilogy talkshow : 基因的遊牧民族-跳躍基因 Transposable Elements ( 選修生物4)

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