The etymology of the word phylogeny comes from the Greek “phylon” which means tribe or race and “gen” which means to produce or generate, it is a branch of biology that is responsible for studying the origin and development of species in a way global. The term was used for the first time by biologist Ernst Haeckel in 1866, this part of biology ratified the theories proposed by biologists Charles Darwin and Alfred Russel Wallace who said that living beings do not remain immutable but evolve with the passing of time. weather.

This science shares the idea that all living beings have a common ancestor and as mentioned, it studies the relationships between different organisms and tries to establish the offspring or relationship that may exist between one and the other. Currently, as a result of the evolution in the field of genetics, the similarities and differences between one species and another can be studied more efficiently.

Over the years, the idea has been shared that living beings evolve due to mutations in DNA, this in order to better adapt to the environment, in some cases these mutations give way to new species, but in others these DNA modifications only change some trait that will help the adaptation of the species to its ecosystem.

The application of phylogeny today has allowed great advances in the scientific and medicinal field, an example of this is the study of the mitochondrial sequence, also when detecting the origin of some contagious disease when comparing strains of bacteria and viruses.