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可以通过粪便鉴定DNA

流言家里的窗户沾上了楼上用户扔下的大便,去质问谁都不承认是自己做的。然而通过检测大便中的DNA再和楼上用户的DNA取样对比,就可以找到谁是犯人。


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真相粪便中有肠道的脱落细胞,可以用来检测DNA并鉴定身份,不过需要对照样本才能确定DNA属于谁。

论证

理论上,此举可行。

人类粪便中有肠道脱落细胞还有肠道菌群。用肠道菌群DNA做个体鉴别在人类身上有没有实践尚不清楚(这么做的一般是用在小鼠身上),但是肠道脱落细胞的DNA肯定是可以检测出来并且用来鉴别身份的。对于流言中提到的事件,检出那坨粪便中的DNA,测找几个不同人之间突变比较多的位点测一下;再和丁女士家11楼-24楼之间的所有住户的DNA检测结果对比一下,应该可以找到完全相同的那一位。

不过如果对方拒绝提供DNA样本的话也就没法比较了,光靠一份DNA是无法完整的还原出个体的外貌特征的。目前这个技术也只是能获取一些粗略的特征,比如肤色、发色、眼睛颜色、性别、族裔之类,脸部特征也只是能估计一下脸型(长和宽)以及“雀斑量”;更精细一点的特征,比如年龄和身高等,DNA就提供不出了,五官长相更别提了。

内容来源

通过粪便鉴定DNA的方法可行吗?小耿,果壳网问答

评论(9)

  • 匿名用户 2017-10-19 16:31
    楼上的,can you speak 人话?
  • 匿名用户 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.
  • 匿名用户 2017-09-25 12:11
    记者卧底偷拍:竟然是用粪便做的,而且很多人都吃过!
  • 匿名用户 2017-09-21 19:58
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  • 匿名用户 2016-10-10 18:42
    1939551047
  • 匿名用户 2016-07-13 11:23
    我想说拉屎的不见得就是扔屎的那位
  • 匿名用户 2016-07-13 11:22
    我想说拉屎的不见得就是扔屎的那位
  • 匿名用户 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 .
  • 匿名用户 2015-09-29 18:20
    以后技术成熟,成本低了,真的可以用

共同编辑: 冈部红莉栖

最后更新:2015-06-04 14:31

分类: 科学技术> 生物学     标签:DNA/粪便/鉴定/生物学

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