1. Warm-up 2/21: Measure the length of your hand in cm. Place ruler up on desk & Stand your hand up. Measure from bottom of palm to tip of tallest finger. Use your phone or a friends phone and enter your results at http://goo.gl/8y4qVAhttp://goo.gl/8y4qVA or link on Mr. E’s page Turn in flipbook. Study for quiz.

2. DISRUPTING GENETIC EQUILIBRIUM Ch. 16-2 pp. 321-325 Warm-up 2/26: What are the 5 conditions for Hardy-Weinberg genetic equilibrium? Define and give an example for: Superposition Phylogeny Allele Frequency Gene Pool Study for Quiz

3. DISRUPTING GENETIC EQUILIBRIUM Ch. 16-2 pp. 321-325 Warm-up 2/29: What are the 5 conditions for Hardy-Weinberg genetic equilibrium? What is genetic equilibrium? Explain the equilibrium. What 5 conditions would disturb this genetic equilibrium?

4. Definitions..  Evolution is the change in a population’s genetic material (alleles) over generations.  A population is in genetic equilibrium if it’s not evolving

5. Natural Selection (3 Types) Rules Organisms best suited to their environment live to reproduce and pass on their genes Acts on a phenotype Varying types of selection

6. WHAT PUSHES A POPULATION OUT OF EQUILIBRIUM? 5 Factors Population is in equilibrium

7. I. Mutation  Produces and introduces new alleles in a population

8. II. Migration/ Gene Flow  Movement of individuals in or out of a population  Immigration – In (Entering population)  Emigration – Out (Leaving population)

9. III. Genetic Drift  The amount of an allele changes due to random events  Affects small populations mostly  Lose alleles if not enough to mate or a catastrophe occurs

10. III. Genetic Drift The amount of an allele changes due to random events  EX: extreme weather, disease, habitat destruction, etc  Affects small populations mostly! Case Study: Population of the nearly extinct northern Elephant Seal have lost genetic variability—individuals are homozygous for all their genes tested. This result of genetic drift makes the species vulnerable to extinction.

11.  Can amplify certain traits and reduce others through sexual selection  Sexual Selection - Choose mates based on specific traits and those traits increase in the population IV. Non-random mating

12. V. Natural Selection (3 Types)  Organisms best suited to their environment live to reproduce and pass on their genes  Acts on a phenotype  Varying types of selection

13. V. NON-RANDOM MATING  a. Artificial Selection- Humans choose desirable traits in animals to cause changes.

14. DISRUPTING GENETIC EQUILIBRIUM (CONT) Ch. 16-2 pp. 321-325 Warm-up 2/29: What are the 5 conditions for Hardy-Weinberg genetic equilibrium? What is genetic equilibrium? Explain the equilibrium. What 5 conditions would disturb this genetic equilibrium?

15. Directional Selection Individuals with a more extreme form of trait have higher fitness Normal Distribution Distribution after Selection

16.  https://www.youtube.com/watch?v=iTmHtxJpEWE https://www.youtube.com/watch?v=iTmHtxJpEWE

17. Stabilizing Selection Having average form of trait has highest fitness Normal Distribution Distribution after Selection

18. Disruptive Selection Individuals with any extreme trait has a higher fitness and most likely results in two new species Normal Distribution Distribution after Selection

19. Homework  Evidence For Evolution Packet  Analogous Structures p6 & Embryology p. 7-12 Due Monday (2/29)  Biogeography section and Map Due Tuesday (3/1)  Finish Evidence For Evolution Flipbook  Pages # 6-7 Due Tuesday (3/1)  Lab: Variation in a Population p11-13: Due Tuesday  Worksheet #3: Disrupting Equilibrium: Due Wednesday (3/2)  Evo 2 Study Guide: Due Thursday March 10

20. HW:  Due Mon: Read 317-320 Do p320 #1-5 Due Mon  Due Tuesday: Vocab & Read p 321-325 Do problem p 325 #2-5  Vocab (Tri-fold) for: Vocab Gene Flow Phylogeny/ phylogenic tree Genetic Drift Adaptive Radiation Stabilizing Selection Allele frequency Disruptive Selection Gene pool Directional Selection Hardy-Weinberg genetic equilibrium Superposition

21. DISRUPTING GENETIC EQUILIBRIUM Ch. 16-2 pp. 321-325 Warm-up 2/21: Describe what happened with the gene pool with the mice from yesterdays video. (Min. 3 sentences & use as much Vocab as you can.) What are the five assumptions that must hold true to achieve genetic equilibrium?