BIOL 2053 Lecture 10: Mechanisms of Variation
29 Sep 2018
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Mutation : permanent , heritable changes in genetic material. Base analogues : structurally slips bases or physical agents ) Dna - modifying agents chemically change nitrogenous bases ( substitutions ) Forward mutation : from wild type to mutant form. Formed by crossing chromosomes during gene transfer cparents sister between over kids) meiosis. Create stable recombinant with characteristics org ) of donor and recipient . transformation. Dna is not always accepted into another cell. Donor self cant recomb . no stable. Small , circular extra chromo sat double - stranded replicate autonomously , Contains attachment t transfer for cell genes transfer. Dna contracts to get closer system joins two donor replicated in cells transferred to secretion. Dna of f plasmid in hfr up portion of chromosome cell picks during replication and excision into plasmid. " bacteria into recipient cell into environment when they lyse . Competent cells : binds tree dna and accepts it .
