ANT101H5 Lecture Notes - Lecture 7: Omomyidae, Frontal Lobe, Biological Anthropology
Document Summary
Understanding the past: macroevolution o vertebrate & mammalian taxonomy. Human diversity is seen as the result of microevolutionary forces: small changes in allele frequencies acting on the human gene pool vs. macroevolution: appearance of new species due to many generational changes in allele frequencies (appear and disappear) Homologies o structures possessed by 2 different organisms that arise in a similar fashion pass through similar stages during embryonic development organisms that share a common ancestor o: may serve different functions. Systematics o cladistics: how to identify relationships/characteristics traditional approach categorize organisms based on homologous traits o o o o. Convergent o determine ancestral versus derived (modified) homologous traits to determine lineage clade: a group of organisms with a common ancestor. Divergent o a single ancestral species gives rise to 2 or more descendant species physical & social barriers two phylogenetically unrelated organisms develop greater similarities similar environments.
