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      1. 科普中國 提交流言

        可以通過糞便鑒定DNA

        流言家里的窗戶沾上了樓上用戶扔下的大便,去質問誰都不承認是自己做的。然而通過檢測大便中的DNA再和樓上用戶的DNA取樣對比,就可以找到誰是犯人。


        展開

        真相糞便中有腸道的脫落細胞,可以用來檢測DNA并鑒定身份,不過需要對照樣本才能確定DNA屬于誰。

        論證

        理論上,此舉可行。

        人類糞便中有腸道脫落細胞還有腸道菌群。用腸道菌群DNA做個體鑒別在人類身上有沒有實踐尚不清楚(這么做的一般是用在小鼠身上),但是腸道脫落細胞的DNA肯定是可以檢測出來并且用來鑒別身份的。對于流言中提到的事件,檢出那坨糞便中的DNA,測找幾個不同人之間突變比較多的位點測一下;再和丁女士家11樓-24樓之間的所有住戶的DNA檢測結果對比一下,應該可以找到完全相同的那一位。

        不過如果對方拒絕提供DNA樣本的話也就沒法比較了,光靠一份DNA是無法完整的還原出個體的外貌特征的。目前這個技術也只是能獲取一些粗略的特征,比如膚色、發色、眼睛顏色、性別、族裔之類,臉部特征也只是能估計一下臉型(長和寬)以及“雀斑量”;更精細一點的特征,比如年齡和身高等,DNA就提供不出了,五官長相更別提了。

        內容來源

        通過糞便鑒定DNA的方法可行嗎?小耿,果殼網問答

        評論(10)

        • 匿名用戶 2019-07-05 20:37
          流行語百科前來報到
        • 匿名用戶 2017-10-19 16:31
          樓上的,can you speak 人話?
        • 匿名用戶 2017-09-29 08:32
          I as well as my pals were studying the excellent points located on your web site and so all of a sudden I had a horrible suspicion I never expressed respect to the web blog owner for those techniques. My people had been certainly passionate to study all of them and have now truly been having fun with those things. Many thanks for genuinely so thoughtful and for picking out this sort of beneficial areas millions of individuals are really desirous to be aware of. My sincere apologies for not expressing gratitude to you earlier.
        • 匿名用戶 2017-09-25 12:11
          記者臥底偷拍:竟然是用糞便做的,而且很多人都吃過!
        • 匿名用戶 2017-09-21 19:58
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        • 匿名用戶 2016-10-10 18:42
          1939551047
        • 匿名用戶 2016-07-13 11:23
          我想說拉屎的不見得就是扔屎的那位
        • 匿名用戶 2016-07-13 11:22
          我想說拉屎的不見得就是扔屎的那位
        • 匿名用戶 2016-05-12 07:35
          Hello my family member! I wish to say that this article is awesome, great written and include almost all sigiifncant infos. I would like to see extra posts like this .
        • 匿名用戶 2015-09-29 18:20
          以后技術成熟,成本低了,真的可以用

        共同編輯: 岡部紅莉棲

        最后更新:2015-06-04 14:31

        分類: 科學技術> 生物學     標簽:DNA/糞便/鑒定/生物學

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