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Unit 7 unit at a glance
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Unit 7 unit at a glance


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  • 1. Unit 7. Evolution (20 days) Textbook Readings Chapters 21, 22, 23, 24, 25, 26 Essential Knowledge Questions: • 1.a.1 Natural Selection is a major mechanism of evolution • 1.a.2 Natural Selection acts on phenotypic variations in populations • 1.a.3 Evolutionary change is also driven by random processes • 1.a.4 Biological evolution is supported by scientific evidence from many disciplines, including mathematics • 1.b.1Organisms share many conserved core processes and features that evolved and are widely distributed among organisms today • 1.b.2Phylogenetic trees and cladograms are graphical representations (models) of evolutionary history that can be tested. • 1.c.1 Speciation and extinction have occurred throughout the Earth’s history • 1.c.2 Speciation may occur when two populations become reproductively isolated from each other • 1.c.3 Populations of organisms continue to evolve. • 1.d.1 There are several hypothesis about the natural origin of life on Earth, each with supporting scientific evidence. • 1.d.2 Scientific evidence from many different disciplines support models of the origin of life. Laboratory Exercises • AP® Biology Laboratory Investigation 2: Mathematical Modeling: HardyWeinberg [C8] o Goal: To calculate allele and genotype frequency using the HardyWeinberg theorem, to discuss the effect of natural selection on allele frequencies; to predict the effect of selection against a particular phenotypic class on allele frequency, to discuss the relationship between evolution and changes in allele frequencies (dry lab) • AP® Biology Laboratory Investigation 3: Comparing DNA sequences to Understand Evolutionary Relationships with Blast o Goal: To use bioinformatics as a tool to determine evolutionary relationships and to better understand genetic diseases.
  • 2. Chapter 21: Genetic Basis of Development Differentiation and Morphogensis Differential Gene Expression Totipotency and Pluripotency Pattern formation in Drosophilia Homeobox genes Chapter 22: Descent with Modification Lamarck vs. Darwin theories of evolution Natural Selection Homologous structures Vestigial organs Chapter 23: Evolution of Populations Gene pool Hardy-Weinberg Law Altering genetic composition (Hardy-Weinberg) Advantage of heterzygosity Types of selection (directional, disruptive, stabilizing) Chapter 24: Origin of Species Micro vs. macro evolution Reproductive isolation mechanisms Allopatric vs. sympatric speciation Polyploidy Adaptive radiation Chapter 25: Phylogeny Convergent evolution and analogous structures Classification scheme: kingdom, phylum, class…. Cladistics Molecular clock Chapter 26: The Tree of Life Miller’s experiment Radiometric dating and half life First prokaryote characteristics Endosymbiotic theory