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.
Interior designers use their skills to make interior spaces appealing and functional. They work with clients and other design professionals to understand how the interior space will be used and what the ambience should represent. To be successful as an interior designer, you need education, communication skills and a bit of innate creativity.