Probabilidade Match DNA
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
About this calculator
The DNA Fingerprinting Match Probability Calculator is an online tool that helps determine the probability of two DNA profiles being identical by chance. It uses the formula (1/freq)^loci, where freq is the allelic frequency of each locus and loci is the number of loci considered. This allows users to estimate the probability of a match between two DNA profiles.
The formula used by the calculator is based on probability theory and is widely accepted in the scientific community. It takes into account the allelic frequency of each locus and the number of loci considered, providing an estimate of the probability of a match. It is essential to note that the probability of a match is not a direct measure of relatedness or identity, but rather a tool to help evaluate the relationship between two DNA profiles.
The DNA Fingerprinting Match Probability Calculator is useful in various situations, such as in criminal investigations, forensic genetics studies, and scientific research. However, it is crucial to be cautious when interpreting the results, as the probability of a match can be influenced by several factors, including DNA quality, locus selection, and allelic frequency in the population.
When using this calculator, it is essential to remember that the probability of a match is just one of the tools used in DNA analysis. It is fundamental to consider other factors, such as morphology, family history, and other relevant data, to obtain a more comprehensive view of the relationship between two DNA profiles.
Frequently asked questions
What is DNA match probability?
DNA match probability is the chance of two DNA profiles being identical by chance.
How does the calculator estimate match probability?
The calculator uses the formula (1/freq)^loci, considering allelic frequency of each locus and number of loci.
What are the precautions when interpreting results?
It is essential to consider DNA quality, locus selection, and allelic frequency in the population.
In what situations is the calculator useful?
In criminal investigations, forensic genetics studies, and scientific research.
Is match probability a direct measure of relatedness or identity?
No, it is just a tool to help evaluate the relationship between two DNA profiles.