BIOL 28600 Lecture 6: Biology 286_ Introduction to Ecology and Evolution
4 Mar 2018
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Document Summary
Hierarchically organized: smaller parts combine to make increasingly complex systems. Theory: an explanation of a set of observations that are based on hypotheses that have been supported multiple times, it is broad and addresses a series of related phenomena and can be modified over time without being negated. How do these relate to microevolutionary changes: macroevolutionary changes occur over long periods of time and produce distinct phenotypic changes. Microevolution produces changes in allelic frequency that produce short term evolutionary changes. Individuals with inherited traits that increase their fitness will increase their frequency in a population relative to other competing individuals: what is the unit of evolution (what evolves), population is the unit of evolution. How are genes related to evolution: evolution is the process of changes in gene frequencies over time. Allele frequencies an be quantified and used to assess evolutionary change: gene flow is the immigration of new individuals into a population that introduces new alleles.
