 Why the Y
While conventional STR DNA analysis has been highly publicized over the past decade and used to aid countless criminal investigations, a newer technology known as Y-STR analysis is now being implemented in many laboratories.
The benefits of using Y-STR analysis in criminal cases stem from the fact that Y-STRs focus solely on short tandem repeats (STRs) that exist along the Y chromosome. Because females do not have Y chromosomes as part of their genetic material, all female contributions in an evidence stain are virtually ignored with Y-STR analysis. This fact is very advantageous when analyzing evidence samples that contain high levels of female DNA and only a very small amount of male DNA.
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