Y-STR and Mitochondrial DNA: Lineage Analysis and Database Considerations (UGC-NET Unit III)
Published:
Questions
30
Duration
30 min
Faculty-reviewed
0
Updated
17 May 2026
About this mock
Advanced UGC-NET Forensic Science Unit III drill on lineage markers: Y-chromosome short tandem repeats (Y-STR) and mitochondrial DNA (mtDNA). Y-STR coverage spans Yfiler Plus 27-locus and PowerPlex Y23 multiplexes, paternal inheritance with no recombination on the non-recombining region of Y (NRY), male-specific typing in sexual-assault casework, haplotype frequency estimation via the Y-chromosome haplotype reference database (YHRD), the counting and discrete laplace methods, inability of standard Y-STRs to resolve paternally related males, and use of rapidly mutating Y-STRs (DYS570, DYS576, DYF387S1). mtDNA coverage includes the 16,569 bp circular genome, the revised Cambridge Reference Sequence (rCRS, Anderson 1981 / Andrews 1999), hypervariable regions HV1, HV2, HV3, Sanger and massively parallel sequencing (MPS) workflows, point and length heteroplasmy, drift across tissues, maternal lineage, haplogroups (M and N for India), application to highly degraded samples (hair shafts, bones, ancient remains), EMPOP and SWGDAM interpretation guidelines, and casework benchmarks including the Romanov identification (Gill et al. 1994). Indian context covers ICMR, CCMB, CDFD, and CFSL DNA divisions.
Sources & references
Questions in this mock are written and verified against the following sources. Citations are recorded per question and shown in the explanation after submission.
- cited in 3 questions
SWGDAM Interpretation Guidelines for Mitochondrial DNA Analysis by Forensic DNA Testing Laboratories, 2019
Section 3, Sequencing strategy including bidirectional read confirmation
Open source - cited in 2 questions
Parson W, Gusmao L, Hares DR et al., DNA Commission of the International Society for Forensic Genetics: revised and extended guidelines for mitochondrial DNA typing, Forensic Science International Genetics 2014
Volume 13, pages 134-142, including IUPAC ambiguity codes for point heteroplasmy
Open source - cited in 2 questions
Andrews RM, Kubacka I, Chinnery PF, Lightowlers RN, Turnbull DM, Howell N, Reanalysis and revision of the Cambridge reference sequence for human mitochondrial DNA, Nature Genetics 1999
Volume 23, page 147, formal revision of Anderson 1981
Open source - cited in 2 questions
Butler JM, Advanced Topics in Forensic DNA Typing: Interpretation, 1st edition
Chapter 15, Mitochondrial DNA, including comparative statistical strength versus autosomal STRs
Open source - cited in 1 question
Just RS, Irwin JA, Parson W, Mitochondrial DNA heteroplasmy in the emerging field of massively parallel sequencing, Forensic Science International Genetics 2015
Volume 18, pages 131-139, foundational MPS mtDNA forensic validation review
Open source - cited in 1 question
Mulero JJ, Chang CW, Calandro LM et al., Development and validation of the AmpFlSTR Yfiler PCR Amplification Kit, Journal of Forensic Sciences 2006
Volume 51, Issue 1, pages 64-75, including male-to-female sensitivity studies down to 1:1000 ratios
Open source - cited in 1 question
Lutz S, Weisser HJ, Heizmann J, Pollak S, Location and frequency of polymorphic positions in the mtDNA control region of individuals from Germany, International Journal of Legal Medicine 1998
Volume 111, pages 67-77, with subsequent EMPOP and SWGDAM updates on HV3 utility
Open source - cited in 1 question
Stewart JEB, Fisher CL, Aagaard PJ, Wilson MR, Isenberg AR, Polanskey D, Pokorak E, DiZinno JA, Budowle B, Length variation in HV2 of the human mitochondrial DNA control region, Journal of Forensic Sciences 2001
Volume 46, pages 862-870, classic forensic description of HV2 length heteroplasmy
Open source - cited in 1 question
Directorate of Forensic Science Services, Ministry of Home Affairs, India, Forensic Science Procedure Manuals, DNA Section
DFSS manuals covering mtDNA Sanger workflows, MPS deployment at CDFD and CFSLs, and admissibility under BSA 2023
Open source - cited in 1 question
Thompson JM, Ewing MM, Frank WE et al., Developmental validation of the PowerPlex Y23 System, Forensic Science International Genetics 2013
Volume 7, Issue 2, pages 240-250, full validation study
Open source - cited in 1 question
Prinz M, Carracedo A, Mayr WR et al., DNA Commission of the International Society for Forensic Genetics (ISFG): recommendations regarding the role of forensic genetics for disaster victim identification (DVI), Forensic Science International Genetics 2007
Volume 1, Issue 1, pages 3-12, ISFG DVI recommendations covering Y-STR and mtDNA role
Open source - cited in 1 question
Wilson MR, Polanskey D, Butler J, DiZinno JA, Replogle J, Budowle B, Extraction, PCR amplification, and sequencing of mitochondrial DNA from human hair shafts, BioTechniques 1995
Volume 18, pages 662-669, foundational study of hair-shaft mtDNA heteroplasmy
Open source - cited in 1 question
Andersen MM, Caliebe A, Jochens A, Willuweit S, Krawczak M, Estimating trace-suspect match probabilities for singleton Y-STR haplotypes using coalescent-theory-based methods, Forensic Science International Genetics 2013
Volume 7, Issue 2, pages 264-271, plus YHRD documentation on the discrete laplace estimator
Open source - cited in 1 question
Kivisild T, Bamshad MJ, Kaldma K et al., Deep common ancestry of Indian and western-Eurasian mitochondrial DNA lineages, American Journal of Human Genetics 1999
Volume 65, pages 1737-1751, foundational Indian mtDNA M and N phylogeography
Open source - cited in 1 question
Wilson MR, DiZinno JA, Polanskey D, Replogle J, Budowle B, Validation of mitochondrial DNA sequencing for forensic casework analysis, International Journal of Legal Medicine 1995
Volume 108, pages 68-74, founding forensic mtDNA validation including hair-shaft samples
Open source - cited in 1 question
Jobling MA and Tyler-Smith C, The human Y chromosome: an evolutionary marker comes of age, Nature Reviews Genetics 2003
Volume 4, pages 598-612, review of NRY structure and lineage marker theory
Open source - cited in 1 question
Metspalu M, Kivisild T, Metspalu E et al., Most of the extant mtDNA boundaries in South and Southwest Asia were likely shaped during the initial settlement of Eurasia by anatomically modern humans, BMC Genetics 2004
Volume 5, Article 26, foundational Indian mtDNA structure study
Open source - cited in 1 question
Gill P, Ivanov PL, Kimpton C et al., Identification of the remains of the Romanov family by DNA analysis, Nature Genetics 1994
Volume 6, pages 130-135, the foundational Romanov mtDNA paper
Open source - cited in 1 question
Stoneking M, Melton T, Nott J et al., Establishing the identity of Anna Anderson Manahan, Annals of Human Genetics 1995
Volume 59, pages 1-9, plus Gill et al. 1994 Nature Genetics
Open source - cited in 1 question
Weissensteiner H, Pacher D, Kloss-Brandstaetter A et al., HaploGrep 2: mitochondrial haplogroup classification in the era of high-throughput sequencing, Nucleic Acids Research 2016
Volume 44, W58-W63, the HaploGrep 2 paper plus van Oven and Kayser 2009 Phylotree
Open source - cited in 1 question
Butler JM, Advanced Topics in Forensic DNA Typing: Methodology, 1st edition
Chapter 13, Y-chromosome short tandem repeats and chapter 14, Mitochondrial DNA analysis
Open source - cited in 1 question
Willuweit S and Roewer L, The new Y Chromosome Haplotype Reference Database, Forensic Science International Genetics 2015
Volume 15, pages 43-48, with discussion of counting estimators and conservative upper confidence bounds
Open source - cited in 1 question
Ballantyne KN, Goedbloed M, Fang R et al., Mutability of Y-chromosomal microsatellites: rates, characteristics, molecular bases, and forensic implications, American Journal of Human Genetics 2010
Volume 87, Issue 3, pages 341-353, foundational RM Y-STR panel and close-relative discrimination data
Open source - cited in 1 question
Kayser M, Roewer L, Hedman M et al., Characteristics and frequency of germline mutations at microsatellite loci from the human Y chromosome, American Journal of Human Genetics 2000
Volume 66, pages 1580-1588, founding mutation-rate study used in forensic Y-STR interpretation
Open source - cited in 1 question
Cann RL, Stoneking M, Wilson AC, Mitochondrial DNA and human evolution, Nature 1987
Volume 325, pages 31-36, foundational mitochondrial Eve paper
Open source
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Questions are written and edited by the ForensicSpot team and cited from peer-reviewed forensic textbooks, official syllabi and primary case law. Each one is verified before publishing. Detailed explanations show after you submit, so the test stays a real test. See a mistake? Tell us.
Common questions
What does the Y-STR and Mitochondrial DNA: Lineage Analysis and Database Considerations (UGC-NET Unit III) mock cover?+
Advanced UGC-NET Forensic Science Unit III drill on lineage markers: Y-chromosome short tandem repeats (Y-STR) and mitochondrial DNA (mtDNA). Y-STR coverage spans Yfiler Plus 27-locus and PowerPlex Y23 multiplexes, paternal inheritance with no recombination on the non-recombining region of Y (NRY), male-specific typing in sexual-assault casework, haplotype frequency estimation via the Y-chromosome haplotype reference database (YHRD), the counting and discrete laplace methods, inability of standa
How many questions and how long is the test?+
30 multiple-choice questions, 30 minutes total. Difficulty: hard. Tier: Premium.
Who is this mock for?+
Forensic science students and aspirants who want timed, exam-style practice with explanations and verified source citations on NET. Useful for postgraduate entrance preparation and for BSc / MSc forensic students testing their recall under time.
Are the questions reviewed?+
Each question carries a verified source citation. Faculty review for individual questions is in progress.
Do I need an account to take this mock?+
Yes, a free ForensicSpot account is required to start a timed attempt — this lets you save progress, see per-question explanations after submission, and track your topic-level performance over time.