Genetic Drift page 400 11 Is the following sentence true or false Natural

Genetic drift page 400 11 is the following sentence

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Genetic Drift (page 400) 11. Is the following sentence true or false? Natural selection is the only source of evolutionary change. 12. Random change in allele frequencies in small populations is called . 13. A situation in which allele frequencies change as a result of the migration of a small subgroup of a population is known as the . 14. What is an example of the founder effect? Evolution Versus Genetic Equilibrium (page 401–402) 15. What does the Hardy-Weinberg principle state? 16. The situation in which allele frequencies remain constant is called . 17. List and describe the five conditions required to maintain genetic equilibrium. a. b. Disruptive Selection Number of Birds in Population Beak Size Largest and smallest seeds become more common. Number of Birds in Population Beak Size Population splits into two subgroups specializing in different seeds. populations has a random change that occurs. true It may not show in future generation or it may not get passed onto future ones at all. The allele would most likely disappear from the allele traits and it may disappear from the gene pool. stabilizing selection directional selection disruptive selection b a c There must be reandom mating The Hardy-Weinberg natural true true founder effect Hardy-Weinberg It is when a subgroup of principle states that allele frequencies will remain constant unless one or more factors say otherwise. genetic equilibrium The population must be very large
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Name______________________________ Class__________________ Date ______________ 60 c. d. e. 18. Is it common for a population to remain in genetic equilibrium? Explain your answer. 61 Section 16–3 The Process of Speciation (pages 404–410) Key Concepts What factors are involved in the formation of new species? Describe the process of speciation in the Galápagos finches. Introduction (page 404) 1. What is speciation? Isolating Mechanisms (pages 404–405) 2. Is the following sentence true or false? Individuals in different species can have the same gene pool. 3. What does it mean for two species to be reproductively isolated from each other? 4. What must happen in order for new species to evolve? 5. List three ways that reproductive isolation occurs. a. c. b. 6. When does behavioral isolation occur? 7. Is the following sentence true or false? Eastern and Western meadowlarks are an example of behavioral isolation.
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