1/15/16 Journal Discussion Questions

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1/15/16 Journal Discussion Questions Please compare and contrast Darwin and Lamarck’s evolutionary ideas. Use your textbook.

Reminders Review your discussion questions and ppt notes ~5 min each night for the daily quizzes. Root Quiz January 20th Evolution & Taxonomy Exam on the 21st- chapters 14, 15, and 17 **Science Fair- Shuttle at 12:40 today in the back bus loading zone

QUIZ 1st period Clear your desks of everything QUIZ 1st period Clear your desks of everything Do NOT write on the quiz please Use CAPITAL letters please Keep your answers covered If you need to make up a quiz due to an absence… let me know Flip it over when you are finished and hang on to it.

Quick Notes about Natural Selection Four ways natural selection can act on a population 1. Stabilizing Selection where the average phenotype is selected for

Quick Notes about Natural Selection Four ways natural selection can act on a population 2. Directional Selection where one of the extremes in phenotype is selected for

Quick Notes about Natural Selection Four ways natural selection can act on a population 3. Disruptive/Diversifying Selection where both of the extremes in phenotype is selected for

Quick Notes about Natural Selection Four ways natural selection can act on a population 4. Sexual Selection- Based on the ability to attract a mate. Usually males and females differ a lot. Ex: Peacocks.

I. Natural Selection causes populations to evolve There are other mechanisms that cause evolution: II. Mutation III. Gene Flow (immigration, emigration) IV. Recombination of chromosomes during gamete formation AND V. Genetic Drift – which are just chance events. Bad luck not bad genes! Examples: A. Founder effect – where a small segment of a population is displaced to a new area B. Bottleneck effect- a natural disaster leaves a few survivors (hurricane, fire, tornado, flood, etc)

https://www.youtube.com/watch?v=5NdMnlt2keE 1st needs

Today’s Objective: Objective: To Review Evolution by analyzing a Bill Nye clip. If time remains, to recognize and calculate the frequency of alleles in a population over time to determine if evolution is occurring

Greatest Discoveries with Bill Nye “The Origin and Evolution of Life” Complete the handout as we watch

Hardy- Weinberg ppt – If time remains today Just listen….no fill in the blank notes for this

Hardy – Weinberg The Equations: To calculate allele frequency use p + q = 1 To calculate genotypic frequency use the top equation Round to the nearest tenth P = dominant allele frequency q = recessive allele frequency p2 = homozygous dominant frequency Q2 = homozygous recessive frequency 2pq = heterozygous frequency https://www.youtube.com/watch?v=xPkOAnK20kw

Hardy-Weinberg Practice Handout you picked up at the door. Work in your assigned groups to complete the rest of the problems. SKIP SAMPLE 3

EXIT TICKET Please define evolution and give an example? Please explain microevolution and give an example Please describe speciation and give one way it can occur. Please compare and contrast natural and artificial selection