BIOL 4140 Lecture Notes - Lecture 20: Facultative Anaerobic Organism, Cystic Fibrosis, Gene Duplication
Document Summary
Bacteriophage: lytic cyc le, 1) phage attaches to host cell and injects dna 2) phage. Dna circularizes and enters lytic cycle or lysogenic cycle . Dna circularizes and enters lytic cycle or lysogenic cycle 3b) Phage dna integrates within the host bacterial chromosome by recombination, becoming a prophage 4b) lysogenic bacterium reproduces normally by many cell divisions 5) Viruses engage in mutualistic relationships: conditional mutualism- fungus- virus- plant all need to work together to survive in harsh conditions. Endogeization of exogenous virus: retroviruses can infect germite cells germline infection . Mendelian inheritance: in her children inactivation by mutations (locus is still in the genome) loss or fixation in the population. Syncytin: in all mammals, placenta formation is dependent on ancient retroviral env proteins coded for by ervs. Us and viruses are dependent on each other. Is this a topic of ecology or evolution: relative abundance of each species is changing ecology.
