9/29/14 Journal Discussion Questions Please compare and contrast microevolution and macroevolution. What is Adaptive Radiation? Convergent Evolution? Vestigial Structure? Give an example of each 3. A paleontologist is comparing the fossilized remains of two primates. Both animals had a prehensile tail. What can be concluded from this evidence? A. They were not related. B. They lived on the ground. C. They evolved from a common ancestor. D. They had bipedal locomotion.

9/29/14 Journal Discussion Questions 1. There are several ways speciation can occur. Please discuss the three isolating mechanisms (notes).

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

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

QUIZ Clear your desks of everything Do NOT write on the quiz please   QUIZ 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.  

Today’s Objective: Objective: To recognize and calculate the frequency of alleles in a population over time to determine if evolution is occurring

Hardy-Weinberg ppt Just listen …. No fill in the blank notes

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.

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