The Holland theory of careers (Holland, 1984) rests on an implicit assumption of isomorphism between the relative frequency distribu- tions of occupations and personalities congruent to those occupa- tions. A number of mechanisms are described which theoretically could act to generate a tendency towards isomorphism. Elements of the sociological linkage hypothesis are shown to be germane to the processes by which isomorphism may be generated. The version of the linkage hypothesis (Mortimer and Kumka, 1982) which posits a relationship between the quality of the father/son relationship and intergenerational personality transmission is tested using the;Holland RIASEC taxonomy. No support was found for the Mortimer and Kumka linkage hypothesis; References;Holland, J. L., Making Vocational Choices (Second Edition). Prentice-Hall: Englewood Cliffs, New Jersey, 1984. Mortimer, J. and D. Kumka. "A further examination of the occupational linkage hypothesis." The Sociological Quarterly 23 (Winter) 3-16, 1982.