BIO120H1 Lecture Notes - Lecture 4: Noncoding Dna, Mutation Rate, Mendelian Inheritance
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BIO120H1 Full Course Notes
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Bio120: neodarwinism and the evolutionary significance of genetic variation (lecture 4) Superbugs and antibiotic resistance = evolution (best place to study evolution is in hospitals) Recall: requirements for darwin"s theory: variation: variation among individuals in a population, heredity: progeny resemble their parents more than unrelated individuals, selection: some forms better at surviving and breeding in a given environment. Darwin was an ecologist (no knowledge about genetics, didn"t know mechanisms of inheritance) Genotype: genetic constitution of an organism, used in relation to a particular gene or gene combinations (e. g. aa, aabb) Phenotype: the organism as observed, used when discussing a trait or a feature of an organism that varies. A lot of variability that isn"t genetic (irrelevant as far as evolution is concerned) Genome: the entire organism"s dna including both genes (protein) and noncoding regions. Junk dna : may not be junk, may actually have a function. Genes: basic unit of transmission of genetic information from one generation to the next.