ANTHRO 105 Lecture Notes - Lecture 3: Darwinism, Thomas Robert Malthus, Thomas Hunt Morgan
14 Sep 2017
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Therefore, there competition for resources constrains population size. An organism can pass on traits acquired during its lifetime to its offspring. Independently developed theory of evolution by natural selection. Co-published first article about natural selection w/ darwin. Descent with modification earlier forms during the history of the earth. Birds on one island had seeds and nuts. Individuals with such traits reproduce more than those without: some biological traits are more advantageous than others. 2: offspring inherit the advantageous trait, these traits become more common in a population. Mechanisms of evolution: natural selection, mutation, gene flow, genetic drift. Gemmules: invisible particles in male and female reproductive organs. Founder of what is now recognized as genetics. Experiments w/ pea plants revealed many principles of inheritance. Mendelian inheritance: traits don"t blend, rather one trait might show up or the other. Phenotype: physical trait: segregation: alleles for each gene separate during reproduction so that only one allele for each gene is passed down.
