BI110 Chapter Notes - Chapter 1.4-1.5: Genetic Variation, Eukaryote, Archaea
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Bi 110 - chapter notes (1. 4 and 1. 5) Variation within a population of organisms that can be inherited. Some variants are better able to grow and reproduce (higher fitness) in a particular environment, natural selection. Whatever traits help your survive an environment the population will end up with more of. Organisms with the highest fitness will contribute in such small amounts at a time that it will only change the population over time. Mutations are a change from its normal situation. Fish with mutation passes it to its offspring. Fish without mutation die off and the mutation lives on if it is beneficial. In nature mutations that harm growth and reproduction die out because they have a lower fitness. Mutations that are neither harmful nor beneficial persist. Beneficial mutations gradually become incorporated into the genetic makeup of species because the fittest survive. Those that have the ability to survive have a higher chance of surviving.
