ANTH 1001 Lecture : Anthro Notes 101212
Document Summary
Cladistics: a method that looks more closely at homologous traits. (looking at and analyzing the details. ) condition. Ancestral (primitive) a homologous trait that has not altered from the ancestral. Derived (modified) a homologous trait that has altered from the ancestral condition. Cladogram the way of exhibiting the cladistics data. Biological species concept based on reproductive isolation. This defines a species as a group of interbreeding organisms that produce viable offspring. Problems: there are organisms that are labeled as separate species, but regularly interbreed. Phylogenic species concept defines a species as a group of organisms who share common traits that are based on descent from a common ancestor. Paleospecies a name given to a fossil species. Intraspecific variation within a species that can be accounted for by age or sex. Cladogenesis a single population experiences some isolating mechanism and becomes separated into two different groups.
