Y Chromosome STR Typing in Crime Casework

Forensic Sci Med Pathol. 2009;5(2):77-84. doi: 10.1007/s12024-009-9089-5. Epub 2009 May 20.

Abstract

Since the beginning of the nineties the field of forensic Y chromosome analysis has been successfully developed to become commonplace in laboratories working in crime casework all over the world. The ability to identify male-specific DNA renders highly variable Y-chromosomal polymorphisms, the STR sequences, an invaluable addition to the standard panel of autosomal loci used in forensic genetics. The male-specificity makes the Y chromosome especially useful in cases of male/female cell admixture, namely in sexual assault cases. On the other hand, the haploidy and patrilineal inheritance complicates the interpretation of a Y-STR match, because male relatives share for several generations an identical Y-STR profile. Since paternal relatives tend to live in the geographic and cultural territory of their ancestors, the Y chromosome analysis has a potential to make inferences on the population of origin of a given DNA profile. This review addresses the fields of application of Y chromosome haplotyping, the interpretation of results, databasing efforts and population genetics aspects.

Publication types

  • Review

MeSH terms

  • Chromosomes, Human, Y*
  • Continental Population Groups / genetics
  • DNA Fingerprinting*
  • Genetic Markers
  • Haplotypes
  • Humans
  • Male
  • Rape
  • Tandem Repeat Sequences*

Substances

  • Genetic Markers