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.
Color blindness is a sex-linked trait that is caused by a recessive gene. Sex-linked characteristics occur more often in males because they only have one X chromosome while females have two X chromosomes. The X chromosome holds much more genetic information than the Y chromosome. So, while females need to have two recessive genes to become color blind, males only need one recessive gene to be affected. Therefore, males have a greater chance of inheriting color blindness.