Genes determine the composition of our bodies and therefore may also be the reason why criminals commit such violent crimes. Scientists have thought about this question and although it has been said that our life experiences only contribute about half of the influence of this criminal behavior, there is no evidence that supports this idea. However, after examining approximately 1,000 DNA profiles, they discovered that there are two particular genes that are found in violent criminals and not in non-violent criminals. It is important to know that people with these two genes will automatically become criminals. Many other factors could contribute. Say no to plagiarism. Get a tailor-made essay on “Why violent video games should not be banned”?Get the original essayResearchers examined around 900 Finnish prisoners; offenders had committed either violent or nonviolent crimes. They also took into account their environmental factors, such as their childhood or substance abuse. After studying both criminals and the general population, they discovered two genes in particular associated with extremely violent behavior. The gene, which had a low level of activity in violent criminals, was responsible for a protein called monoamine oxidase A (MAOA), and the other had produced a member of the cadherin family, CDH13 (helps to make of dopamine, which plays a major role in addiction and helps control the reward and pleasure centers of the brain). The protein has been linked to drug addiction and ADHD. The study indicates that 5-10% of all extremely violent crimes committed in Finland could be linked to these two genotypes. It should be noted that these are extremely rare behaviors and that the majority of these individuals with these genes will not commit crimes. Nor should it be used to defend criminals in court. The source does not have a publication date but the last paragraph tells us that this was done after Source 2 was published, so it was written between October 2014 and 2018. There is no research that contradicts this source. There is no bias in this article and the language and tone was written by someone who has a great understanding of this topic. The results are consistent with other results I have read and the authors did not deliberately omit any research. This can therefore be considered reliable. The author is unknown but there is supporting evidence as the source refers to the different researchers, from different universities around the world, who conducted the study. The research was carried out in Finland and no, this does not affect the results because these two genes are found in people all over the world. This was therefore considered partly valid, because we do not know the author. Keep in mind: this is just a sample. Get a personalized article from our expert writers now. Get a Custom Essay This helps me narrow down my research and it increases my knowledge of the subject because it gave me additional information about the two genes that could affect criminals. The context is similar to that of my research. This can therefore be considered useful.