Is there really a happy gene? ?Do you think you have it? ?I’m not sure I do! ?Do you?
Happiness Is Partly Inherited. The key to happinessmay lie in your genes. Psychologists at the University of Edinburgh and the Queensland Institute for Medical Research in Australia have found that happiness is partly determined by personality traits that are largely hereditary, along with your situation in life.
https://www.livescience.com/2346-happiness-partly-inherited.html