EPISODE · Nov 13, 2025 · 14 MIN
2025 biology talkshow:粒線體DNA-母系遺傳與分子時鐘
from 雷比特生物空中講 · host 雷比特老師
詳細闡述粒線體 DNA (mtDNA) 的獨特之處，它在遺傳學上呈現出與細胞核 DNA 不同的規律。解釋mtDNA 屬於絕對的「母系遺傳」，雖然在生理上一個細胞內可能有多套拷貝，但在遺傳學追溯上則被視為單套來源。此外，探討父系粒線體在受精後消失的兩種主要機制：物理屏障或被卵子主動降解。最後指出mtDNA 因其不重組和穩定的突變率，成為科學家用來追溯人類起源，並推算歷史上「粒線體夏娃」的關鍵「分子時鐘」。 聽完後可以自主進行線上測驗，檢視學習成效喔~(需要登入gemini) 測驗網址 https://gemini.google.com/share/7da93d8a98fc Powered by Firstory Hosting
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2025 biology talkshow:粒線體DNA-母系遺傳與分子時鐘
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