1. Unit 5 Evolution

2. What is Evolution?
Evolution:

3. Microevolution Change in a population’s genetic structure over time
Change in: alleles/genotype

4. Causes of Microevolution
Genetic drift: Random changes in frequency of alleles in a population Gene flow: change of alleles due to migration into or out of a population Mutation: random change in individual’s genotype Natural selection: survival of the fittest

6. Which causes of microevolution form adaptations?
What is an example of human adaptation?

7. Macroevolution
Massive change to earth causing:

8. DNA
What is the purpose of DNA?

9. Mutations (changes in DNA)
How can mutations affect an individual? How can mutations affect a population?

10. Changes in genotype
How can the genotype of an individual change? How can the genotype of a population change?

11. Change in Phenotype
How can the phenotype of an individual change? How can the phenotype of a population change?

12. Variety in Populations (adaptations)
What are adaptations? How do adaptations form in a population?

13. Changes in the allele frequency within the gene pool
What is the allele frequency? How can it be changed in a popultion?

14. New Species
How do new species form? What must they do to survive? What happens if the species cannot survive?

15. Charles Darwin Darwin proposed the theory of natural selection
Natural Selection: organisms pass more favorable traits to offspring  ensuring survival
“Survival of the Fittest”
Publish book, “Origin of Species” in 1859

16. Darwin’s Theories
Descent w/ modification: younger fossils are a modification of their ancestors
Example:
Similar fossils of a species were found in close locations
Similar Species share a:

18. C. Darwin’s Theories Adaptation: trait acquired to survive changes
Fitness: ability to pass on favorable traits to offspring
Adaptive Advantage: traits that enable a species to survive better in its environment

20. Peppered Moths