BIO 1130 Lecture : Microevolution lecture notes.doc

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Jon Houseman

Document Summary

Must look at variation within populations rather than individuals. In population there is a range of variation and in many cases, the variation is genetic and heritable. When we want to see natural selection, we need to measure and monitor variation within the population. Mendel gives us an heritable basis for variation. Huxley combines genetics with evolution and gives us calculations in population genetics that become predictable for changes in variation. We need mechanisms to measure change and to quantify change. The synthetic theory of evolution (populations genetics + natural selection based on mendelian genetics) allows us to measure change. Microevolution occurs when there is change in allelic frequencies. Traits present in two forms associated with a homologous chromosome phenotype. Visual expression of an underlying gene; does not tell allele frequency. Identical alleles of the gene are present on both homologous chromosomes heterozygous. Two different alleles of a gene dominant and recessive.