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Exam 1

Evolution

TermDefinition
What are Darwin's 4 postulates of evolution? 1. individuals within a species must have variance 2. some of these variations must be heritable 3. some of these inherited variations must be better for survival 4. the variations better for survival are not random
How do mutation's effect evolution? Most mutations are either silent or harmful and are not a strong force because these mutations usually alter a single protein. It becomes a stronger force when the mutation is in the form of a duplication of a regulatory gene controlling whole pathways
What is genetic drift? This is a random change in allele frequencies in a small population due to chance events
What is gene flow? This is a homogenizing effect on a population due to allele transference by movement of individuals
What is the founder effect? This has to do with gene flow, a small population with one or two genotypes spawns a new area so there is not much variation
Created by: 924654707556942