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Bioinformatics Knowledge Database 國網中心生物知識庫與生物計算服務系統: 天擇與演化

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動物進化出與入侵者共存的機制
當動物受到寄生蟲、病毒或其他病原體攻擊時,通常都用免疫系統進行反擊。但是根據一項針對齧齒動物進行的新研究卻顯示,牠們還進化出一種與入侵者共存的機制。這項研...
Posted by TerryYeh on Thursday, November 15 @ 18:41:07 CST (2066 reads)
動物進化出與入侵者共存的機制



小鼠的快速演化
芝加哥動物學會和伊利諾大學芝加哥分校的Oliver R. W. Pergams和Dennis Nyberg等人,利用一種在野外發現的白足鼠,於過去一百五十年間發生大量的遺傳變化,顯示哺乳動物基因...
Posted by TerryYeh on Monday, October 29 @ 11:26:56 CST (2089 reads)
小鼠的快速演化



微演化的證據:南極大陸阿德利企鵝
由義大利、紐西蘭及美國的研究團隊長期研究南極大陸上阿德利企鵝的族群遺傳,利用同地區現生的企鵝族群及六千年前的企鵝骨骼化石中的微衛星DNA標記,找到了族群微演化過程的證據。造成差異的因子可能是突變、基因漂變、族群間的基因交流,也或許是由於巨大的冰山改變企鵝遷徙模式所導致。
Posted by slayers on Thursday, November 09 @ 22:01:16 CST (2991 reads)
微演化的證據:南極大陸阿德利企鵝



人類演化的關鍵基因
根據紐約路透社的報導,科學家在人類基因組中發現一群基因序列有別於黑猩猩,可能是造成人類演化的關鍵,因為相較於人類的基因組,這些基因序列在黑猩猩身上數千年來都未曾...
Posted by TerryYeh on Monday, August 21 @ 16:13:41 CST (2486 reads)
人類演化的關鍵基因



雀喙之謎--競爭下的快速演化
在太平洋赤道海域的加拉帕哥斯群島上生活著一些地雀,它們的喙因外形獨特而聞名。這些地雀啟發了一個多世紀前遊經此地的英國生物學家達爾文提出演化論。而今更以自己的演化證實天擇可以在很短時間裡使形態發生明顯變化。
Posted by TerryYeh on Thursday, July 27 @ 08:56:59 CST (2853 reads)
雀喙之謎--競爭下的快速演化



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