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GA/T 1978-2022: Forensic sciences-Technical specifications for X-STR
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Forensic sciences-Technical specifications for X-STR
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GA/T 1978-2022
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Basic data | Standard ID | GA/T 1978-2022 (GA/T1978-2022) | | Description (Translated English) | Forensic sciences-Technical specifications for X-STR | | Sector / Industry | Public Security (Police) Industry Standard (Recommended) | | Classification of Chinese Standard | A92 | | Classification of International Standard | 13.310 | | Word Count Estimation | 11,194 | | Date of Issue | 2022-03-09 | | Date of Implementation | 2022-08-01 | | Issuing agency(ies) | Ministry of Public Security | | Summary | This standard applies to all forensic science DNA laboratories using X-STR typing technology for forensic individual identification and paternity testing (including paternity testing and kinship testing). | GA/T 1978-2022: Forensic sciences-Technical specifications for X-STR---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 13.310
CCSA92
People's Republic of China Public Security Industry Standards
Forensic science X-STR test technology method
Released on 2022-03-09
2022-08-01 Implementation
Released by the Ministry of Public Security of the People's Republic of China
foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents"
drafting.
Please note that some contents of this document may refer to patents. Publishing of this document
The Agency assumes no responsibility for identifying patents.
This document was submitted by the Criminal Investigation Bureau of the Ministry of Public Security.
This document is under the jurisdiction of the National Criminal Technology Standardization Technical Committee (SAC/TC179).
This document was drafted by. Physical Evidence Appraisal Center of the Ministry of Public Security, Guangzhou Municipal Public Security Bureau, Sun Yat-sen University, Zhejiang Provincial Public Security Department, Tianjin Municipal Public Security Bureau, Beijing
Beijing Municipal Public Security Bureau, China Criminal Police Academy.
The main drafters of this document. Yu Zhengliang, Liu Chao, Li Wanshui, Sun Hongyu, Wu Weiwei, Nie Tonggang, Lu Zhiyong, Guo Fei, Ding Guangshu, Yuan Liping.
Forensic science X-STR test technology method
1 Scope
This document specifies the technical methods for X-STR testing and typing by forensic science DNA laboratories.
This document applies to all forensic science DNA laboratories using X-STR typing technology for forensic individual identification and paternity testing
(Including paternity test and relative test).
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document.
GA/T 382-2014 Forensic Science DNA Laboratory Construction Specifications
GA/T 383-2014 Forensic Science DNA Laboratory Inspection Specification
GA/T 965-2011 Forensic Science DNA Paternity Test Specification
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
X-STR locus X-STRLocus
Short tandem repeats present on the human X chromosome. Under normal circumstances, females have 2 X chromosomes, and at each X-STR base
There are 2 alleles at the gene locus; males have only one X chromosome and only 1 allele at each X-STR locus.
3.2
chain linkage
In the process of inheritance, alleles at adjacent loci on the same chromosome are passed on to offspring as a whole.
3.3
In the process of inheritance, alleles at different loci are not randomly combined and transmitted according to Mendel's law of free combination. place
Alleles at a locus in linkage disequilibrium tend to be inherited together.
3.4
linkage equilibrium linkageequilibrium; LE
In the process of inheritance, alleles at different loci are randomly combined and transmitted according to Mendel's law of free assortment. in the company
Alleles at a locus in lock equilibrium have the property of being independently inherited.
3.5
Likelihood ratio likelihoodratio; LR
The ratio of two probabilities for the same evidence under different assumptions.
Note. It is called parentage index (PI) in paternity testing, and it is called kinship testing (KI) in kinship testing.
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