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.
Requirements for a Kitchen and Bath Designer. According to the BLS, an undergraduate degree typically is required for entry-level interior design jobs. Associate's and bachelor's degree programs in the field are offered through colleges, universities and design schools. Master's programs in interior design also are available.