Do you often get angry? Maybe you can blame your genes now, says a new study.
German researchers say that a gene called DARPP-32 may help explain why some people fly into a rage at the slightest provocation, while others can remain calm.
The researchers, from the University of Bonn, asked over 800 people to fill in a questionnaire designed to study how they handle anger.
The team also administered a DNA test to determine which of three versions of the DARPP-32 gene people were carrying.
The gene affects levels of dopamine, a brain chemical linked to anger and aggression.
Researchers found that those who had the "TT" or "TC" versions of the gene portrayed significantly more anger than those with the "CC" version.
They also found that those who display more anger have less grey matter in the amygdala, a part of the brain that helps keep our emotions balanced.
"In other words, they are not able to control their feelings as well as those without the mutation," the Telegraph quoted Martin Reuter, one of the researchers, as saying.
The researchers said that genetics only account for around half of our disposition towards anger, while DARPP-32 is one of several genes involved.
The study has been reported in the journal Behavioural Brain Research.