ENVS 1000U Lecture Notes - Lecture 7: Antimicrobial Resistance, Allopatric Speciation, Natural Disaster
27 Jan 2020
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If they cannot adapt, organisms usually go extinct. Evolution through natural selection in our community. Ex: beavers entire population in a place like quebec, that beaver population have genes (dna) that describes their characteristics. We all have a unique genetic makeup. Takes 10s of 100s of generations for evolution to actually show its effects. However, pesticide and antibiotic resistance is an example of fast-growing evolution. Individuals in a population can have changes in their genetic makeup. Sometimes the environment can change genetic makeup and uv radiation can cause it as well. We are tracking what is called as a gene pool where it is a pool of genetic characteristics that are available in a population. Loss of genetic variation can occur from random events, movements, and mating. Insects reproduce quickly ex: fruit flies are a standard in genetics. Population drifts from one level of genetic variation to a lesser level of genetic variation based on how random mating is conducted.
