Investigation of the human genome involves the examination of many factors such as gene function,
structural features of the genome, chromatin arrangement, recombination rate, and mutation to
accurately understand its complex relationship with physiology and diseases. With the sequencing
of the human genome, there is an increasing number of studies investigating the influence of genes
during the development of behavior and personality traits. Studies show that complex behavior and
traits are regulated by multiple genes. In this sense, genes that affect the dopamine pathway are
studied in relation to the field of neuroscience. Studies on sports genetics include all of the studies
in this field, such as the identification of genes that affect athletic performance, the elucidation of the
mechanisms of action of these genes, and the determination of predispositions in terms of athletic
performance. Considering the factors that determine success in sports, it is of great importance to
create training and nutrition programs suitable for genetic structure not only in individual sports but
also in team sports. This study will be presented as a review of the associations in the literature about
catechol‑O‑methyltransferase, 5‑hydroxytryptamine transporter, and monoamine oxidase, known in
the literature as candidate genes that affect the personality and behavioral characteristics of athletes
and are especially related to aggression.