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.
3. Become an apprentice or intern. Instead of seeking formal education in a class setting, you can get a job as an apprentice or assistant to an interior decorator in your area. On the job training will teach you the guidelines of working with clients, businesses, retailers and products.