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– Part of how happy a married person feels may be tied to their genetic makeup. Researchers at the University of California Berkeley found a gene that helps regulate the hormone seratonin can affect how someone reacts emotionally to what’s going on in their marriage. In a 13-year study of married couples, they learned the people with a certain gene variant had trouble tolerating emotional discord. Participants with two short versions of the variant showed real unhappiness to negative emotions like anger and a happy demeanor if things were going well in their marriage. People with one or two long versions of the gene variant were much less bothered by the emotions in their marriages.

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