Y-STR analysis focuses on short tandem repeats (STRs) found on the Y chromosome, only carried by male individuals. For forensic labs, the most common application of Y-STRs is in criminal cases such as sexual assault, where evidence samples are difficult to resolve with traditional autosomal STR analysis due to low amounts of male DNA present in a high background of female DNA.
The Use and Significance of Y-STR Testing. By Julie Heinig, Ph.D. October 1, 2007. While many legal professionals may be well acquainted with the conventional autosomal Short Tandem Repeat (STR) analysis that is typically associated with forensic cases involving DNA, some may be less familiar with the technique of Y-chromosome STR analysis (commonly referred to as Y-STR).
SWGDAM Contamination Prevention and Detection Guidelines for Forensic DNA Laboratories. SWGDAM Recommendations for the Efficient DNA Processing of Sexual Assault Evidence Kits. SWGDAM Guidelines for the Validation of Probabilistic Genotyping Systems. SWGDAM Guidelines for the Collection and Serological Examination of Biological Evidence.