Polygenic traits are traits determined by the combined effect of more than one pair of genes. Human stature is an example of this trait. The size of all body parts from head to foot combined determines height. The size of each individual body part are determined by numerous genes.
Although you don't necessarily have to major in interior design, a bachelor's degree or higher in the discipline provides the best foundation for a career, according to the Foundation for Interior Design Education and Research.
Degree programs in interior design may be accredited by the Council for Interior Design Accreditation or from the National Association of Schools of Art and Design. Most schools that offer interior design programs enroll students through art, architecture or design departments.