BIOL 3300 Lecture Notes - Mendelian Inheritance, Pseudogene, Plants And Animals
Document Summary
Phylogeny shows relationship: tip end points, what currently exists, nodes common ancestor for general taxa, transitions / show change, change is labelled. Use characters to create tree; 2 types: homology similar feature due to descent from common ancestor; look different, analogy (convergent evolution) similarity due to selection pressure or but from the same ancestor environment. Ex: wings in birds, bats and insects, beak shape and size. Processed pseudo genes (non-functional copy of gene: lack promoters and introns, can be used to estimate age. Lamarck (1809) argued spp change into new species. Inheritance of acquired traits (we know this is wrong) Evolution (descent with modification) and natural selection. Evolution is not progressive: never is not better, species we see are best adapted to current environment. Fisher, wright, and haldane: combined natural selection & mendelian inheritance. Look purely at observation; dna not discovered yet.
