DNA testing: what it is for and how it is done

The DNA test is done with the aim of analyzing the person's genetic material, identifying possible changes in the DNA and verifying the probability of the development of some diseases. In addition, the DNA test used in paternity tests, which can be done with any biological material, such as saliva, hair or saliva.

The price of the test varies according to the laboratory in which it is performed, objective and genetic markers evaluated and the result can be released in 24 hours, when the goal is to assess the person's total genome, or a few weeks when the test is done for check the degree of kinship.

What is it for

The DNA test can identify possible changes in the person's DNA, which may indicate the probability of the development of diseases and the chance of being passed on to future generations, in addition to being useful to know their origins and ancestors. Thus, some diseases that the DNA test can identify are:

  • Various types of cancer;
  • Heart diseases;
  • Alzheimer's;
  • Type 1 and type 2 diabetes;
  • Restless legs syndrome;
  • Lactose intolerance;
  • Parkinson's disease;
  • Lupus.

In addition to being used in the investigation of diseases, DNA testing can also be used in genetic counseling, which is a process of those who aim to identify changes in DNA that can be transmitted to the future generation and the likelihood of these changes resulting in disease. Understand what genetic counseling is and how it is done.

DNA testing for paternity testing

DNA testing can also be performed to check the degree of parentage between parent and child. To perform this test, it is necessary to collect a biological sample from the mother, son and the alleged father, which is sent to the laboratory for analysis.

Although the test is most often performed after birth, it can also be done during pregnancy. See how the paternity test is done.

How is done

DNA testing can be done from any biological sample, such as blood, hair, sperm or saliva, for example. In the case of DNA testing performed with blood, it is necessary that the collection be performed in a reliable laboratory and the sample be sent for analysis.

However, there are some kits for home collection that can be purchased online or in some laboratories. In this case, the person must rub the swab contained in the kit on the inside of the cheeks or spit in a proper container and send or take the sample to the laboratory.

In the laboratory, molecular analyzes are carried out so that the entire structure of human DNA can be analyzed and, thus, check for possible changes or compatibility between samples, in the case of paternity, for example. Know the main molecular techniques.