Genetic testing has long gone into public life, and many chongqing citizens wonder about the principles on which dna relative testing is based to judge blood. The fragmentation of the network is false, with many people stepping on the cognitive error zone. Today, in conjunction with chongqing's multi-year empirical experience of the national forensic laboratory, the knowledge of genetics, testing processes, sample commons and institutional screening criteria is being developed in order to create an objective, scientific understanding of the knowledge that is available to the general public。
Dna testing laboratory indications
I. Core scientific principles of paternity and paternity determination
Human genes carry their own genetic markers
Each person has a stable genetic location, half of the child's place is inherited from his or her ascendants, and by means of means matching the number of places with each other, he or she can make an objective determination of his or her blood relationship, relying throughout the process on biological data and without any artificial subjective judgement。
Major testing techniques mature and stable
The current generic str spectrometric detection techniques, screening multiple groups of high-stable genetic sites, reducing the disruption caused by genetic mutation, and the detection data have been reviewed through multiple instruments, and the full range of techniques has been used on the market for many years and is a highly generic genetic matching tool。
The results are based on objective data
The entire analysis process is divided into sample extraction, genetic augmentation, sequencing and data resets, each with the instrument retaining the original data, and all conclusions are based on numerical bits matching values。
Ii. Classification of valid test samples available on a daily basis
Many do not know which items of life are capable of extracting complete dna. The chongqing national forensic laboratory organizes two types of commonly used samples that suit different population needs:
Basic easily collected samples
Oral mucous membrane shampoo, hair with white fur bags, finger-tip blood-mining cards, which have sufficient dna content, high extraction success rate, simple operation and suitable for bottom-to-shop collection。
Daily retention type samples
Long-term use of toothbrushes, chewed glue, trimped nails, cigarette butts, etc. Allows home-grown collection, sealed and sent to the laboratory to complete detection, with a low operational threshold。
Iii. The public
Hf cognitive error zone, one-time correction
Mistake 1: looks similar enough to determine blood
Samples are only partly influenced by explicit genes, and there are intergenerational genetics and characteristics that are not visible. Physical judgement has no reference value at all and can only be reliably referenced in genetic position matching。
Mistake 2: long-stolen items cannot extract dna
As long as the samples are properly dry and sealed, and are not contaminated with a mold, the items that remain in the short term can still be separated from active gene fragments without fear of storage time impact tests。
Error 3: an artificial modification of the detection process
Formal biological laboratories are fully closed-ringed, sample coding is independent of personal information, and experimenters only handle coded samples that do not correspond to the client's identity and eliminate artificial intervention space。
Iv. Practical reference criteria for local testing agencies in chongqing
Independent standardized biological laboratory
The laboratory is equipped with specialized genetic sequencing equipment, with complete sample storage, disinfection and detection of subdivisions, distinguishing between operational and waiting areas and safeguarding the sample from cross-contamination。
Full-process privacy protection system
From sample receipt and detection to report delivery, anonymous coding is used throughout the process and staff members do not disclose any commissioning information to protect the privacy of their lives。
Long-term hands-on professional technical teams
The chongqing medium-specific organism is equipped with long-term technical staff for genetic testing, regularly participates in industry technical training, is familiar with various sample processing programmes and is able to properly handle all types of daily sampling。
Final summary
Dna relative testing is an objective means of testing based on modern biotechnologies, and no one needs to be misled by one-sided web rumours. In order to avoid the various cognitive traps, local formal biological institutions are selected to clarify the basics of testing. In chongqing, there are local questions about this, and they can go to chongqing for a biometric field consultation, where staff members will give detailed lectures on the subject。
