Postprint version. Published in Ancient DNA, editited by B. Heermann and S. Hummel, January 1, 1994, pages 31-58.
NOTE: At the time of publication, the author Francis Villablanca was not yet affiliated with Cal Poly.
The evolutionary analysis of DNA sequences bridges phylogenetics and population genetics. Ancient DNA (aDNA) alJows the study of extinct genotypes, populations, and species, as well as dichronic comparisons of extant populations and species. Thus a DNA forges an empirical link between history and two inherently historical fields of research. Fortunately, the conceptual frameworks of phylogenetics and population genetics can easily be extended to encompass advances being made in the study of aDNA.