老鼠一直對科研發展作出了無比的貢獻,科學家利用老鼠探究癌症、各種疾病以及細胞各式各樣的機制。936Please respect copyright.PENANAkkyGle5IJA936Please respect copyright.PENANAoMPtmiIKBj
936Please respect copyright.PENANAgUN0UP4KzY
(圖2)有時候,科學家會利用「漁翁撒網」的方式來試圖解決難題。936Please respect copyright.PENANA11tHnPeJgk936Please respect copyright.PENANALJAl0LOl4V
936Please respect copyright.PENANAnQyP3h6kqG
譬如說,若果科學家想探討老鼠的那一條基因負責控制老鼠耳朵的顏色,其中一種漁翁撒網的手段就會用上化學物質N-ethyl-N-nitrosourea (ENU) 。936Please respect copyright.PENANAfhEH6tHIib
936Please respect copyright.PENANAeEsBitI5HX
對老鼠注射ENU的話,其基因突變的機率會高出300倍有多。936Please respect copyright.PENANATF3S5lllK6
同樣能導致基因突變的X-Ray,效率就只有約100倍有多。936Please respect copyright.PENANAHACBhTF6s0
936Please respect copyright.PENANABAm3aafLZo
(圖3)對男性老鼠注射ENU的話,他每一顆精子均會有出現不同的隨機基因變異。936Please respect copyright.PENANAt5OkmFGFwK
換句話說,他的後代也會繼承其相應的基因變異。936Please respect copyright.PENANA0QIjWlOWAl936Please respect copyright.PENANAgmzDJnVRbU
936Please respect copyright.PENANA0j6CxYNNLe
我們剛才假設的命題是那一條基因負責控制老鼠耳朵的顏色,若運氣足夠的話,例如小新出現了藍耳朵,那麼科學家們便大可以追查究竟是哪一條基因出現了變異,然後再深入調查箇中的機制。936Please respect copyright.PENANAVaL0fOHu7t
936Please respect copyright.PENANAdS9m0cW5fb
這方法顯然是完全依靠運氣,幸運的話就可能有驚天大發現,無運的話就是資源、時間、金錢一筆清。這方法顯然亦會牽涉到動物的倫理道德問題。如何妥善不浪費所有受過變異的老鼠,是研究人員需要深思的問題。936Please respect copyright.PENANAoEP2AOB8Iv
936Please respect copyright.PENANAVNEtXLtDNY
如果想我快啲出文的話,請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark,這對我非常之重要。936Please respect copyright.PENANADLkRI18IPL
936Please respect copyright.PENANAKK8tBhFw83
Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc936Please respect copyright.PENANAL1O5q4Y6pT
936Please respect copyright.PENANAXQ9d1uINTw
同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」,以課金的方式推動我繼續搜羅資料寫文,多謝。936Please respect copyright.PENANA6RkyQ3o9Uw
936Please respect copyright.PENANAC9SPcYkYK4
Link:936Please respect copyright.PENANAAT6KiU4Rx4
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio936Please respect copyright.PENANAJBnotgNO5J
936Please respect copyright.PENANAoV9FcSyxKC
936Please respect copyright.PENANATYWXoa4AFP
除非Facebook及IG重開侵侵的account,否則我的IG將不會再作更新,只會寄居本土LIHKG及Penana。936Please respect copyright.PENANAf7cZYY4cO3
936Please respect copyright.PENANANTWEuyDsMN
Ref1:https://pubmed.ncbi.nlm.nih.gov/11567631/936Please respect copyright.PENANAlf67H1XKJn
Ref2:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1197804/936Please respect copyright.PENANAIhHH1pTky9