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.
The profession of Interior Design is relatively new, constantly evolving, and often confusing to the public. NCIDQ, the board for Interior Design qualifications, defines the profession in the best way: The Professional Interior Designer is qualified by education, experience, and examination to enhance the function and quality of interior spaces. Read the full definition from NCIDQ.