MICR 221 Study Guide - Final Guide: Cellulomonas, Parasitism, Ice Nucleus

• School: Queen's University
• Department: Microbiology and Immunology
• Course: MICR 221
• Professor: Banfield, Majury, Walker

Document Summary

Micr221 walker study notes: microbial species, diversity, and phylogeny. Reproductive isolation: problematic in asexually reproducing organisms and sometimes weird crosses can happen (ie. zebronkey) but they are sterile. Dna sequence identity: could have nearly identical dna stretches, but debateable in terms of species. When different microbes interact and dna can be transferred to different species (both gram negative and positive: transformation, transposable elements, bacteriophages. Different e. coli strains can even show differences, but share mostly the a common genome. What can alter this mutation rate at a particular locus. Which habitat boasts the highest microbe population size: oceans b) Dna transfer from archaea to bacteria allows them to survive. Molecular clocks determine divergence times of different species: Selective pressure may favor mutations in particular genes some genes may no longer be orthologues (serve the same function) May have 99% identity, but different diseases due to these proteins.