A study done by researchers at the University of South Florida explain why women are often happier than men, depending upon the presence or lack of a certain gene in the brain, the 'Daily Mail' reported.
A gene called 'MAOA' affects the levels of feel-good chemicals in the brain, and is responsible for fluctuating moods in both men as well as women.
The researchers asked some 350 men and women how happy they were and gave a saliva sample that was tested for their DNA.
The MAOA gene comes in two variations- a highly active and a less active type.
It was found that women with the less active type were happier than others, and those with two copies of the 'happy' type of MAOA were happiest of all.
The study found that 59 per cent of the women had one copy and a lucky 17 per cent had two
