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.
It may seem obvious, but in order to become an interior designer, you need to have an innate flair for color, spatial arrangements, architecture and textiles. Do you enjoy decorating your home and get lots of compliments on your decor?