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.
1 Find out more about this Interior Design Certification here. 2  Learn design trends, color theory, concepts of scale and proportion, furniture styles, architectural history, lighting, and fabrics. 3  Learn the newest thinking in Green and Universal design, two of the hottest growth areas in the interior design marketplace.