BIOA01H3 Lecture Notes - Lecture 3: Mutation, Cladogenesis, Anagenesis

• School: UTSC
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Robin Marushia

Document Summary

Sept 8 lec 3 required reading 17 evidence for evolution 1. 1. 2 mechanisms of evolution: predictions & evidence. 2. 2 lineages change over time & some diverge (speciate) 2. 3 natural selection occurs and leads to adaptation. Theories and laws: evolution is a theory. A theory is different from everyday use well-established explanation for a set of phenomena, not a guess. Law of gravity if you drop so(cid:373)ethi(cid:374)g, it"ll hit the grou(cid:374)d is a description of phenomena. Theories to e(cid:454)plai(cid:374) (cid:449)h(cid:455) this o(cid:272)(cid:272)urs: ne(cid:449)to(cid:374)"s theor(cid:455) of u(cid:374)i(cid:448)ersal gra(cid:448)it(cid:455) a(cid:374)d ei(cid:374)stei(cid:374)s". General theory of relativity: definition of evolution. A change in allele (different form of the same gene) frequency in population and in genetic characteristics of a population, but individuals do not evolve. Evolution usually happens gradually (100 1000 of years) Species split into 2 or more species. Evolutionary changes were made by natural selection. The changes that occur in microevolution if given enough time can lead to divergence of species (splitting).