ANT100Y1 Lecture Notes - Lecture 6: Allele Frequency, Mammal, Binomial Nomenclature

• School: UTSG
• Department: Anthropology
• Course: ANT100Y1
• Professor: Sherry Fukuzawa

Document Summary

Vs macroevolution appearance of new species due to many generational changes in allele frequencies. Structures that are superficially similar: share a similar function, built from different parts, do not pass through similar stages during embryonic development organisms do not share a common ancestor, homoplasy: process that leads to analogy. Structures possessed by 2 different organisms that arise in a similar fashion. Pass through similar stages during embryonic development. May serve different functions organisms that share a common ancestor. What binomial nomenclature uses: categorize organisms based on homologous traits cladistics, the new way in which we determine evol relationships btw orgs. The difference is that in cladistics we try to determine ancestral relationships! Try to come up with lineage based on characteristics: determine ancestral versus derived (modified) homologous traits to determine lineage, clade: a group of organisms with a common ancestor. Divergent = a single ancestral species gives rise to 2 or more descendant species.