**Author details**

*Genetic Variation*

genetic differentiation.

**Figure 4.**

**6. Final considerations**

Where *Nm* refers to the number of migrants per generation; *Fst* is the degree of

*Illustrative example of a DNA insertion modifying all the subsequent codons. Source: Google Images.*

When *Fst* is 1, there is a strong differentiation among populations. Gene flow is also very important to reduce genetic drift effects. Due to this particularity, the gene

Genetic diversity is a very important feature of living organisms. It serves for population adapting to environment, once that how higher is the allelic variation, it is more likely that individuals display adaptative characteristics that suits to the

Molecular markers, amplification and DNA sequencing technologies are improving an incredible advance in access genetic variation. The number of

sequences and genomes deposited in the databases grows exponentially, generating an enormous amount of information to be studied and analyzed. The knowledge resulting from this information has innumerous applications and has been promoting a huge revolution in several areas of the biological, agrarian and health sciences. The way we understand, analyze and deal with biodiversity has been intensely modified and deepened by the advancement of genetics. In this context, knowledge about the genetic diversity of organisms will bring solutions to various

flow is extremely important for conservation genetics.

problems and issues involving living beings.

environment. So, genetic diversity is essential for species survival.

**6**

Rafael Trindade Maia1 \* and Magnólia de Araújo Campos2

1 Federal University of Campina Grande, Center for Sustainable Development of Semiarid, Sumé, Paraiba State, Brazil

2 Federal University of Campina Grande, Center of Education and Health, Cuité, Paraiba State, Brazil

\*Address all correspondence to: rafael.rafatrin@gmail.com

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
