Bio 1M03- lecture 3 week 1

Bio 1M03- lecture 3 week 1 - Bio 1M03- lecture 3 Evolution...

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Bio 1M03- lecture 3 Evolution by Natural Selection Chapter 24 -Characteristics of species change over time, evolution MAYBE defined as a change in allele frequencies over time. Mutation selection balance- Natural selection occurs when individuals with certain alleles survive or produce. An adaption is a genetically based trait that increases an individual’s ability to produce offspring in a particular environment. Evolution by natural selection is not progressive, an it does not change the characteristics of the individuals that are selected. Only the characteristics of the population change. Animals do not do things for the good of the species. Not all traits are adaptive. All adaptions are constrained by trade-offs as well as genetic and historical factors. Scientific theories are often made up of observations about a natural pattern and a proposed process that explain that pattern. Greek philosopher claimed that every organism was an example of a perfect essence of type created by God and that these types were unchanging. 1809, jean baptiste de lamarack was the first to propose a formal theory of evolution.
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Bio 1M03- lecture 3 week 1 - Bio 1M03- lecture 3 Evolution...

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