BIOL 123 Lecture Notes - Lecture 14: Alan Templeton, Statistical Model, Molecular Evolution
Document Summary
Can use molecular and morphological characters to identify clades: how bats and human explain not only homology of bones but also homology of many regions of their genomes. Originated of a single individual with that ancestral allele; it just means a particular individuals allele was the one that was present at the time and later became fixed: timing is great deal; whether under selection or not. Positive = accelerate rise in frequency = short coalescence. Alan templeton estimate coalescence of human mitochondrial dna (152,000- Genes do not always reflect true phylogeny of species. Incomplete lineage sorting: describes the case when the history of a gene differs from the history of the species carrying the gene. Molecular phylogenetics: reconstruct phylogeny of a clade of living and extinct species, dna and protein sequences can yield vast info, insertions and deletions, mutations. Advantage of molecular data: know a lot about dna.
