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.
Take courses. The main difference between a designer and a decorator is education. To become an interior designer, you need to enroll in courses on interior design at a university, community college, or design school. You may need to take on jobs for free at first in order to expand your portfolio. 2  Making sure your portfolio translates to an electronic form is critical. 3  In order to get the most out of your portfolio, you will want to create a website that highlights your work and keep an active blog to promote what you've done.