Hair paternity testing is a method of determining paternity through DNA comparison. It mainly involves three aspects: sample collection, DNA extraction and comparative analysis.
First of all, sample collection is the first step in hair paternity testing. Before identification, hair samples from the person being identified and their relatives need to be collected. There are many ways to collect hair samples. Commonly used methods include direct extraction, clipping or the use of adhesive tape. Care needs to be taken during collection to avoid contamination and ensure the purity and integrity of the sample.
The next step is the DNA extraction process. The hair samples collected contain DNA, which is the genetic material that determines an individual\’s genetic characteristics. In order to test paternity, DNA needs to be extracted from hair samples. There are many methods for extracting DNA. Commonly used methods include organic solvent method, protease method and hydrochloric acid method. The extracted DNA needs to be purified and concentrated to ensure the accuracy of subsequent analysis.
The last step is comparative analysis. In comparison analysis, the DNA sample of the identified person needs to be compared with possible relatives. The purpose of the comparison is to find genetic similarities between the two. Comparative analysis is usually performed through techniques such as DNA fingerprinting or PCR amplification. Through comparison, the genetic relationship between the person being identified and relatives can be determined, thereby determining the authenticity of the parent-child relationship.
To sum up, the principle and process of hair paternity testing mainly include sample collection, DNA extraction and comparative analysis. Sample collection is to obtain hair samples, DNA extraction is to extract DNA from the samples, and comparative analysis is to determine paternity. This process requires strict control of the purity and integrity of the sample to ensure the accuracy of the identification results. As a commonly used paternity test method, hair paternity testing can provide scientific basis for families preparing for pregnancy, helping them understand the parent-child relationship and make correct decisions.
