The short allele of the gene 5-HTTLPR determines the smiling man. The carriers of this gene are more likely to laugh while watching a Comedy or jokes friends. Allele in genetics called one of the forms of the same gene, reports The Hindustan Times.
The experiment was attended by 336 people. Subjects were first asked to watch cartoons and funny videos. In the end it was necessary to discuss family problems with her husband.
It turned out that the owners of gene 5-HTTLPR short allele more frequently than others laughed when watching funny videos. Their laughter, the researchers note, was the most sincere, and family matters was easier than volunteers with the long allele of this gene.