BIO120H1 Lecture Notes - Lecture 5: Neo-Darwinism, Alloenzyme, Echinochloa
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BIO120H1 Full Course Notes
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1930-50 theoretical population genetics was initiated by fisher, They provided the foundations for neo-darwinism and the. They showed that continuous variation and darwinian natural selection were entirely consistent with mendel"s laws. They also demonstrated the evolutionary significance of genetic variation leading to several key questions and development of the field of ecological and evolutionary genetics. Important parameters used to measure patterns of genetic variation. Proportion of gene that you sample in a population that are. Average frequency of heterozygous individuals per gene locus (a site on a chromosome that is usually a gene) What processes influence patterns of genetic diversity: mutation. Helps more genetic diversity: random genetic drift. Reduces genetic diversity as a result of the small size. When the good mutation spreads, so over generations all of the individuals have this mutation because it increases fitness. We say the mutation is become fixed over individual hazard. Overtime, all individuals come to have both types.
