It does depend somewhat on the graduate major. In some cases, the expectation of undergraduate course work is that which approximates an undergraduate major in that subject. In other cases, the expectation may not be as much as an undergraduate major in the subject (note that minors are somewhat less standardized across schools than majors, so a given expectation may be more than a minor at one school, but less than a minor at another). Sometimes, the undergraduate expectation may be less than an undergraduate major, but with additional course work expectations outside that major (an example is economics PhD study, where the undergraduate preparation that is expected is somewhat less than an economics major in terms of economics courses, but with additional advanced math and statistics courses added).