07-01-08

07-01-08 - 07/01/08 Clicker questions : 1) Which is least...

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07/01/08 Clicker questions : 1) Which is least likely to represent homology? Legs of a bird and legs of an insect 2) A population of seed cracker finches had small and large billed birds specializing in soft and hard shelled seeds respectively. If climatic change caused all seeds to become hard, what type of selection would then operate on the finch population? Directional Ch. 23: The Evolution of Populations A. The smallest unit of evolution a. One common misconception about evolution is that individual organisms evolve during their lifetime b. Evolutionary processes ( ex. Natural selection) acts on individuals but populations evolve B. Concept 23.1: population genetics provides a foundation for studying evolution a. Microevolution: change in the genetic makeup of a population from one generation to the next b. Population genetics: the study of how populations change genetically over time i. Time is measured in generations C. Populations a. Population: localized group of individuals that are capable of interbreeding and producing fertile offspring
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i. Fig 23.3 D. Mendelian inheritance a. Segregation of genes during meiosis ensures that genetic variation is
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07-01-08 - 07/01/08 Clicker questions : 1) Which is least...

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