Chapter 23 objectives Seniors- Due Wednesday Juniors- Due Thursday. There will be a reading assessment on chapter 23 next class session. STUDY!!!!!! Enjoy your weekend! Your answers are to be turned in as a hardcopy not comments through the blog.

Population Genetics
	1.	Explain why it is incorrect to say that individual organisms evolve.
	2.	Explain what is meant by "the modern synthesis."
	3.	Define a population; define a species.
	4.	Explain how microevolutionary change can affect a gene pool.
	5.	State the Hardy-Weinberg theorem.
	6.	Write the general Hardy-Weinberg equation and use it to calculate allele and genotype frequencies.
	7.	Explain why the Hardy-Weinberg theorem is important conceptually and historically.
	8.	List the conditions a population must meet to maintain Hardy-Weinberg equilibrium.
Causes of Microevolution
	9.	Define microevolution.
	10.	Define evolution at the population level.
	11.	Explain how genetic drift, gene flow, mutation, nonrandom mating, and natural selection can cause microevolution.
	12.	Explain the role of population size in genetic drift.
	13.	Distinguish between the bottleneck effect and the founder effect.
	14.	Explain why mutation has little quantitative effect on a large population.
Genetic Variation, the Substrate for Natural Selection
	15.	Explain how quantitative and discrete characters contribute to variation within a population.
	16.	Define polymorphism and morphs. Describe an example of polymorphism within the human population.
	17.	Distinguish between gene diversity and nucleotide diversity. Describe examples of each in humans.
	18.	List some factors that can produce geographic variation among closely related populations. Define a cline.
	19.	Explain why even though mutation can be a source of genetic variability, it contributes a negligible amount to genetic variation in a population.
	20.	Describe the cause of nearly all genetic variation in a population.
	21.	Explain how genetic variation may be preserved in a natural population.
	22.	Briefly describe the neutral theory of molecular evolution and explain how changes in gene frequency may be nonadaptive.
A Closer Look at Natural Selection as the Mechanism of Adaptive Evolution
	23.	Distinguish between Darwinian fitness and relative fitness.
	24.	Describe what selection acts on and what factors contribute to the overall fitness of a genotype.
	25.	Describe examples of how an organism's phenotype may be influenced by the environment.
	26.	Distinguish among stabilizing selection, directional selection, and diversifying selection.
	27.	Describe the advantages and disadvantages of sexual reproduction.
	28.	Define sexual dimorphism and explain how it can influence evolutionary change.
	29.	Distinguish between intrasexual selection and intersexual selection.
	30.	Describe at least four reasons why natural selection cannot breed perfect organisms.