BIOSC-101 Lecture Notes - Lecture 18: Drosophila Simulans, Coevolution, Zooplankton
26 Aug 2020
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Levels of antagonism between hosts and parasites may depend on the frequency of opportunities for horizontal transfer. Parasite moves from host to unaffected bacteria and reproduces. When the bacteria reproduces, the phage is reproduced. Infects bacteria, making it antibiotic resistant too. It is not going to die from the infection. Once infected, it can"t be infected by another phage. Phage can"t leave the environment due to antibodies. Needs vertical transmission (horizontal will kill phage outside) In the experiment, slower growth is not important while looking at high and low. If the virus leaves, it won"t die , but won"t be able to infect a new host fidelity. Coevolution is a complex process that may depend on selection, migration, and genetic drift. Southern california flies were affected, compared to northern. Host-parasite phylogenies reveal common histories of speciation. Coevolution of bacteria and eukaryotic hosts shows little switching between pathogenic and mutualistic lifestyles.
