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.
An example of a common X-linked recessive trait is redâgreen color blindness, which affects about 10% of males but is unusual among females. In males, the gene for color blindness comes from a mother who usually has normal vision but is a carrier of the color-blindness gene.n example of a common X-linked recessive trait is redâgreen color blindness, which affects about 10% of males but is unusual among females. In males, the gene for color blindness comes from a mother who usually has normal vision but is a carrier of the color-blindness gene.