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.
There are lots of ways to get the education and experience needed to become a professional Web designer or developer. But there are some basics that you should know in order to get a job so that you can gain the experience needed for more advanced jobs.