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Principles of Forensic DNA for Officers of the Court

Indications for Y-STR Analysis

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Photo of red/sore fingernails
National Institute of Justice (NIJ) (see reuse policy).

Typically in such mixture cases, the standard autosomal STR analysis has failed to determine the DNA profile of the male donor(s) or it has not been attempted due to the intractability of the particular mixed sample to such analysis. A good example of a case that would benefit from a Y-STR analysis would be the fingernail scrapings from a female victim who had scratched her male assailant.

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