A new study has been carried out recently by The Florida State University that confirms an MAOA gene sometimes called the "warrior gene" link to gangs and weapons. However, this only applies to males where females seems to have resistance towards the violent effect of the gene.'The MAOA gene affects levels of neurotransmitters such as dopamine and serotonin that are related to mood and behavior, and those variants that are related to violence are hereditary. Some previous studies have found the "warrior gene" to be more prevalent in cultures that are typified by warfare and aggression.' This MAOA gene is detected on the X - chromosome. Therefore it has more effect on males since male has one X - chromosome and a Y- chromosome while female has two X- chromosomes. For females, if there is the risk allele in one of the chromosome, there is another allele that can compensate for it. This is probably why the effect of MAOA has only been detected in males.
Link to the original article:
http://www.sciencedaily.com/releases/2009/06/090605123237.htm
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