MICR-4010 Lecture Notes - Lecture 2: Rhodobacter, Tooth Brushing, Genetic Drift
3 Sep 2018
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Produce photosynthetic pigments in dark: coli, coli. Grown on minimal glucose medium - new pathway evolved. Use bones and teeth of dead people to look for microbes. Core genome: shared by all strain of species. A lot of genes are gained and lost. Live in place w low nutrients and need to save time and energy. If the organism doesn"t need it, it will get rid of it. Bacterial = incorporates multiple methods to identify microbes. Phenotype: examine morphological, metabolic, physiological and chemical characteristics of the cell chemical characteristics of the cell. Small subunit ribosomal rna (rrna) genes highly conserved. Purpose: add gaps to molecular sequences in order to establish positional homology. Make sure each position in the sequence was inherited from a common ancestor. Homology: genes that have been inherited from a common ancestor. Orthologs: genes have the same function and originate from single ancestral gene in common ancestor. Paralogs: evolved into different function as result of gene duplication.
