Evolution A-level lesson 1 of 3 (A-level biology)

Definition of evolution, theories for origin of life, Lamarck and Darwin’s theories of evolution, natural selection, continuous and discontinuous variations. types of selection i.e. direction, stabilizing and disruptive selection, industrial melanism, causes of variation (due to meiosis, fertilization and mutation), causes of mutation; gene and and chromo some mutation, Dawn’s, Kelinefelter’s, and Turner’s syndromes, polyploidy.