A SEP IRA (Simplified Employee Pension) is a retirement plan that is popular with many small business owners and self employed individuals. The 2015 SEP IRA contribution limit is $53,000 (the 2014 SEP limit is $52,000).
Meanwhile, other studies suggest that another gene, DRD4, may also play a role in traits such as shyness and anxiety. The DRD4 gene codes for a protein that binds dopamine, another chemical messenger that has powerful effects in the brain. Again, the DRD4 gene comes in two forms: a long and a short version.
Behavioral genetics' study of personality has made it clear that genes are important. In fact, a number of personality traits have been identified as having a genetic basis. For example, family studies have led to the discovery that generalized anti-social behavior is passed down through genetic inheritance.f a personality trait has a genetic component, an adopted child would show more similarities to their biological parents than their adoptive parents. Family studies, twin studies and adoption studies do not tell researchers what genes are involved.