What is a hair DNA paternity test?
Hair DNA paternity testing is a technical method that uses hair samples to obtain individual DNA information and compares the genetic sequence differences between different individuals to verify the paternity relationship. Because of its keratinized structure, hair has strong corrosion resistance and is easy to obtain. It is not affected by factors such as the developmental age and status of the person being tested. It is a commonly used sample source in paternity testing.
Principles of hair DNA paternity testing
Hair DNA paternity testing is based on the principle of DNA polymorphism. DNA polymorphism refers to certain differences in gene sequences between different individuals. These differences can be divided into microsatellite DNA (STR), single nucleotide polymorphism (SNP), etc. Hair DNA paternity testing usually selects microsatellite DNA (STR) as the analysis target. STR loci of a certain length are obtained through PCR amplification, and the relationship between individuals is identified based on differences.
Advantages of hair DNA paternity testing
As a convenient and accurate testing method, hair DNA paternity testing has the following advantages:
1. Hair samples are simple to obtain and easy to store, and do not require armpit, oral and other samples, making them easy for daily use;
2. Hair samples are not as contagious as blood, saliva and other samples and are safer;
3. Hair samples are easy to save and can be tested again when disputes arise, making it easier to resolve disputes;
4. Hair samples are easy to obtain and can be easily obtained from samples such as carpets and pillows. It is one of the most common detection methods.
Precautions for hair DNA paternity testing
Although hair DNA paternity testing has the above advantages, there are also matters that need to be paid attention to when using it, as follows:
1. When collecting hair samples, be careful not to mix them with other people’s hair to avoid interfering with data analysis;
2. The extraction and separation of hair samples need to be carried out in strict accordance with standardized operating procedures to avoid deviations caused by the influence of external conditions on the samples;
3. The entire identification process must strictly abide by fair and impartial operating procedures to ensure the accuracy and reliability of test results;
4. When disputes arise about test results, fully cite and record test samples and data analysis procedures.
Application scope of hair DNA paternity testing
Hair DNA paternity testing has been widely used in many fields such as criminal investigation, paternity confirmation, legal disputes, and marriage investigations. In addition to the above applications, hair DNA identification technology is also frequently used in child adoption, medical genetics, etc.
Summary
As a simple and accurate technical method, hair DNA paternity testing is widely used in daily life. It has become a routine operation especially in high-risk fields such as confirming paternity and resolving legal disputes. Therefore, the profound mastery and comprehensive application of hair DNA paternity testing technology is of extremely important practical significance.
