You can think of the Earth as being made up of a number of layers, sort of like an onion. These layers get more and more dense the closer to the center of the earth you get. See the picture below to see the four main layers of the earth: the crust, mantle, outer core, and inner core. Crust.
A master's degree is usually required in order to work as a genetic counselor. Many schools that offer these 2-year programs look for applicants who have not only completed undergraduate course prerequisites, but also have volunteer or paid experience in a counseling or social work role.
In some situations, you may be referred to a genetic counselor. A genetic counselor has special training in genetics. In addition to studying your family health history, he or she may refer you for physical exams and tests.