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.
Canadian interior design education can be acquired through the college or university level. Unlike the programs offered in the United States, a degree is not required to become a registered professional designer. Admission to programs marks and creative ability as demonstrated in a portfolio submission.