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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(6)

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  • 匿名用户 2016-05-12 07:35
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  • 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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