DNA paternity testing¶
A genetic assessment that interprets DNA-marker evidence through inheritance and competing paternal hypotheses to report a supported, excluded or unresolved fatherhood relationship.
Core Idea¶
DNA paternity testing interprets DNA-marker observations to assess a specified biological-fatherhood hypothesis. It connects a paternal question and available genetic samples through inheritance rules and declared alternatives to a qualified finding, retaining the limits of the evidence. A direct alleged-father specimen, a maternal specimen, one fixed marker panel and a numerical posterior are not universal requirements; an assessment can remain inconclusive.[ref-bb2ad747f838][ref-bdc9c09f8012][^ref-946a77518b47]
Scope of Application¶
The inspected sources establish human settings with different observation configurations and different conditions for interpreting paternal evidence.
- Direct postnatal testing: alleged-father–child STR comparisons can use trios or motherless duos.[^ref-bb2ad747f838]
- Prenatal plasma testing: a SNP-mixture model infers fetal information from maternal plasma.[^ref-bdc9c09f8012]
- Unavailable alleged father: relatives constrain missing genetic information when he is deceased or missing.[^ref-946a77518b47]
- Close-relative alternatives: another related candidate can limit what a compatible marker result establishes.[^ref-bb2ad747f838]
- Unresolved investigations: insufficient informative evidence can leave the paternal question open.[^ref-946a77518b47]
Standalone maternity or grandparentage asks another relationship question; relatives can nevertheless supply evidence within a paternity assessment.
Clarity¶
A paternity index expresses hypothesis-conditioned evidence, whereas a posterior probability also depends on a prior; neither is interchangeable with a laboratory's local acceptance rule.[^ref-899ab1d1c5be] Likewise, the plasma test's input and finding are distinct from Jiang's separate amniotic-fluid and conventional STR validation comparisons: those comparisons evaluate the implementation rather than constitute its assay input or its finding about a family.[^ref-bdc9c09f8012]
Manages Complexity¶
The method organizes many marker observations and family configurations around a traceable chain: paternal question, selected evidence, inheritance interpretation, alternatives, finding and information limits. This keeps a large score or additional loci from becoming unexplained reassurance: neither automatically repairs an inadequately represented relative alternative, uncertain reported kinship or an uninformative prenatal mixture. A correctly acknowledged information gap is more useful than a precise-looking number that answers the wrong relationship question.[ref-bb2ad747f838][ref-bdc9c09f8012][^ref-946a77518b47]
Abstract Reasoning¶
The useful moves are hypothesis comparison, information-deficit diagnosis and conditional inference. Ask whether more markers would discriminate the relevant paternal alternatives, or whether another informative relative would supply a missing inheritance constraint; an unavailable-father report's resolution rate is not independently established accuracy. Preserve the difference between observed clinical validation and simulation: Jiang did not clinically validate first-trimester performance and reports discordant recruitment ranges. Local thresholds organize reporting without defining the biological relationship.[ref-bdc9c09f8012][ref-946a77518b47]
Knowledge Transfer¶
Within genetic parentage work, the operation transfers only when the inheritance model and sample configuration support the new paternal question; panel frequencies, local cutoffs and mixture performance do not transfer automatically. Analytical Method is its strict genus: selected inputs become a bounded finding under explicit rules and adequacy conditions. Comparison identifies a portable operation within that reasoning, while a non-genetic resemblance remains analogy to the whole procedure; a genetic finding also does not determine legal or social fatherhood.[ref-bb2ad747f838][ref-bdc9c09f8012][^ref-946a77518b47]
Relationships to Other Abstractions¶
Current abstraction DNA paternity testing Domain-specific
Parents (1) — more general patterns this builds on
-
DNA paternity testing is a kind of Analytical Method Domain-specific
DNA paternity testing is an analytical method specialized to inheritance-conditioned genetic evidence and a specified biological-fatherhood question.
Hierarchy path (1) — routes to 1 parentless root
- DNA paternity testing → Analytical Method
Neighborhood in Abstraction Space¶
DNA paternity testing sits in a sparse region of the domain-specific corpus (98th percentile for distinctiveness): few abstractions share its structure, so a faithful description tends to retrieve it precisely.
Family — Unclustered & Miscellaneous (2721 abstractions)
Nearest neighbors
- Genealogical DNA test — 0.76
- Anthropometry — 0.76
- Allele-age inference — 0.75
- Generalist Genes Hypothesis — 0.75
- Ahnentafel — 0.74
Computed from structural-signature embeddings · 2026-10-17
References¶
[^ref-bb2ad747f838]: Gao, H., et al. (2019). “Application of CPI cutoff value based on parentage testing of duos and trios typed by four autosomal kits.” PLOS ONE 14(11), e0225174. https://doi.org/10.1371/journal.pone.0225174. Original full text, Materials and methods; Results, Table 1 and close-relative cases; Discussion. The cutoff, panel comparisons and outcomes are study-bounded.
[^ref-bdc9c09f8012]: Jiang, H., et al. (2016). “Noninvasive Prenatal Paternity Testing (NIPAT) through Maternal Plasma DNA Sequencing: A Pilot Study.” PLOS ONE 11(9), e0159385. https://doi.org/10.1371/journal.pone.0159385. Original full text, Methods, including the mathematical model; Results, Table 1 and comparison paragraph; Discussion/limitations. Plasma findings, amniotic-sequencing agreement and the five-case conventional CE-STR comparison are distinct evidence roles.
[^ref-946a77518b47]: Basgalupp, S. P., et al. (2014). “Investigation of paternity with alleged father deceased or missing: Analysis of success at the end of the report.” Forensic Science International: Genetics 12, 120–121. https://doi.org/10.1016/j.fsigen.2014.05.010. Institutional full article, printed 120–121, PDF indices 0–1; Methods, Results/discussion and Table 1. Conclusions and local reporting criteria are not universal performance estimates.
[^ref-899ab1d1c5be]: Gjertson, D. W., et al. (2007). “ISFG: Recommendations on biostatistics in paternity testing.” Forensic Science International: Genetics 1(3–4), 223–231. https://doi.org/10.1016/j.fsigen.2007.06.006. Original abstract and commission publication record. Access used here is the original abstract and indexed commission text; the broad likelihood-ratio/prior distinction is retained, while detailed reporting rules, quotations and equations are not drawn from uninspected full text.