Is Jealousy Dependent on Gender?

For years, one established theory on jealousy has reigned, explaining the difference between men and women. Men tend to be jealous over sexual discrepancies, as an evolutionary-learned behavior of fear that a child was not their own; conversely, women tend to be concerned over emotional discrepancies as they were evolutionarily dependent on a reliable male partner.
However, two Pennsylvania State psychological scientists raised the question of why some men are more disturbed by emotional affairs, and vice-versa for some women with sexual affairs. They hypothesized that instead it depended on the approach of an individual to a relationship: that autonomous individuals who placed little value on close emotional ties would be more concerned with sexual affairs, while those who developed close emotional ties were more worried about emotional affairs. Studies confirmed their theory, indicating that jealousy is more closely related to both environment and an individual than previously believed.
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