Can ashes be used for paternity testing?

The ashes usually cannot be used for routine paternity testing, but in special cases, trace amounts of DNA can be extracted for identification. Paternity testing requires a complete DNA sample, and the incineration of ashes at high temperatures may cause serious degradation of DNA.

Modern forensic techniques can attempt to extract residual mitochondrial DNA or nuclear DNA fragments from the ashes for comparison. This method requires professional laboratory operation, and the success rate is affected by factors such as ashes storage conditions and incineration temperature. If the ashes are not completely high-temperature treated and properly preserved, some of the carbonized remains of the bones may contain trace amounts of DNA information. However, conventional paternity testing agencies usually do not accept ashes samples and need to contact a forensic testing center with special qualifications.

Traditional paternity testing relies on blood, oral mucosa cells, hair and other samples containing intact cell nuclei. The DNA in ashes is often highly fragmented, and only limited site detection can be carried out, and the accuracy of the results is lower than that of conventional methods. For ashes that are completely incinerated at high temperatures, DNA extraction may fail completely. In some cases, genetic data of other relatives need to be combined to indirectly infer genetic relationships.

It is recommended that biological samples left behind by the deceased be used for identification first, such as toothbrushes, razors, medical pathology slides, etc. If ashes must be used, an institution with experience in ancient DNA analysis should be selected and a composite comparison should be conducted with samples from immediate family members. At the same time, it should be noted that the identification of ashes may involve ethical review and relevant legal documents must be provided before it can be carried out.