BIOLOGY. Monday 2 May 2016

Transcription

1 BIOLOGY Monday 2 May 2016

2 Entry Task What does it mean when a populations allele frequency changes from 20% to 30%? The population is evolving.

3 Agenda Entry Task Housekeeping Exam Study (Kahoot)

4 Housekeeping Chapter 16/17 Exam on Tomorrow, May MC & 4 SA questions Substitute teacher on Thursday, May 5.

5 Kahoot Study questions for chapter 16/17 exam.

6 BIOLOGY Tuesday 3 May 2016

7 Entry Task Explain the principle of common descent. Organisms share a number of inherited characteristics because they have evolved from a common ancestor.

8 Agenda Entry Task Housekeeping Chapter 17 (Evolution of Populations) Video: Evolution at a Snail s Pace

9 Housekeeping Chapter 17 Quiz 1 on Friday, Apr 29. Gene variation & speciation. Chapter 16/17 Exam on Tuesday, May 3. Turn in Desert Snakes CER

10 Chapter 17 Evolution of Populations

11 Chapter 17 Introduction Section 17.1 (Genes and Variations) How do genes make evolution possible? Section 17.2 (Evolution as Genetic Change in Populations) What causes a populations gene pool to change? Section 17.3 (The process of Speciation) How do new species form? Section 17.4 (Molecular Evolution) What can genes tell us about an organism s evolutionary history?

12 Essential Question How can populations evolve to form new species?

13 Learning Objective(s) 17.1 I will be able to explain the main sources of genetic variation in a population 17.2 I will be able to determine allele frequencies given population data I will be able to explain how natural selection affects single gene and polygenic traits I will be able to explain different mechanisms of speciation

14 Untamed Science Video Evolution at a Snail s Pace

15 Chpt 17 Vocabulary Grab one vocabulary worksheet and pass the rest back. They will be due on the day of the exam. Should be completing as you encounter the words.

16 Section 17.1 Genes and Variations

17 Genetics & Evolution Genotype Genetic makeup (e.x. Bb, Rr) Phenotype Physical characteristics of an organism (e.x. brown fur, red petals) pg

18 Genetics & Evolution Populations Group of individuals of the same species living in the same area. Gene Pool All the genes present in a population. pg. 483

19 Genetic Variations Mutations Change in the genetic material. Genetic Recombination in Sexual Reproduction Independent assortment during meiosis. 23 pairs of chromosomes = 8.4 million gene combinations. Lateral Gene Transfer Exchanging of genes from one organism to another. pg

20 Traits Single Gene Traits Traits controlled by only one gene. Polygenic Traits Traits controlled by two or more genes. pg. 485

21 BIOLOGY Wednesday 27 Apr 2016

22 Entry Task What are the three sources of genetic variations? Mutations Sexual Reproduction Lateral Gene Transfer Which involves the changing of genetic material within a cell? Mutations

23 Agenda Entry Task Housekeeping Protective Coloration Lab (Natural Selection)

24 Housekeeping Chapter 17 Quiz 1 on Friday, Apr 29. Gene variation & speciation. Chapter 16/17 Exam on Tuesday, May 3. Study guide provided on Thursday, Apr 28.

25 Lab Protective Coloration: 1 box with cutout butterflies per group 2 lab worksheets per group. 1 graph/questions worksheet per person. Follow the instructions on the worksheet. Each group member will complete one generation. A different group member will set up the next generation.

26 BIOLOGY Thursday 28 Apr 2016

27 Entry Task What is the primary reason new species are formed? (section 17.3) Reproductive Isolation

28 Agenda Entry Task Housekeeping Protective Coloration Lab Section 17.2 Section 17.3

29 Housekeeping Chapter 17 Quiz 1 tomorrow, Friday, Apr 29. Gene variation & speciation. Chapter 16/17 Exam on Tuesday, May 3. Study guide provided at the end of the period.

30 Lab Protective Coloration: Review your data worksheet. Finalize concepts with group. Complete the graph and questions.

31 Section 17.2 Evolution as Genetic Change in Populations

32 Natural Selection Single Gene Traits: Can lead to changes in allele frequencies. Leads to changes in phenotype frequency. pg. 488

33 Natural Selection Polygenic Traits: Affects the relative fitness of phenotypes. Produces on of three types of fitness: Directional Selection Stabilizing Selection Disruptive Selection pg

34 Polygenic Traits Directional Selection: Individuals at either end are more fit. Shifts because some are more successful at survival. Stabilizing Selection: Average individuals have higher fitness. Disruptive Selection: Individuals at the outer ends are more fit. Can create two distinct phenotypes. pg. 489

35 Section 17.3 Process of Speciation

36 Mechanisms of Speciation Reproductive Isolation: Two population become reproductively isolated & can no longer breed. Leads to new species. Develops in a variety of ways: Behavioral Isolation Geographic Isolation Temporal Isolation pg. 495

37 Mechanisms of Speciation Behavioral Isolation: Differences in courtship rituals or other behaviors. Geographic Isolation: Separated by geographic barriers such as rivers, mountains, or bodies of water. Temporal Isolation Two or more species reproduce at different times. pg. 495

38 BIOLOGY Friday 29 Apr 2016

39 Entry Task Galapagos finches became, which led to creating two distinct species. Reproductive Isolation Speciation

40 Agenda Entry Task Chapter 17 Quiz 1 Housekeeping Chapter 16/17 Study Guide

41 Biology Chpt 17 Quiz 1 Clear off your desks. Remember No talking Keep your eyes on your own paper. No electronics during the exam. Do not write on the exam. When you are finished Check to make sure you have filled in all bubbles. Place question and answer sheets on the front table. Silently (no talking) work on study guide.

42 Housekeeping Chapter 16/17 Exam on Tuesday, May MC & 4 SA questions Substitute teacher on Thursday, May 5. Turn in your Protective Coloration Lab graph.

43 Exam Study Guide Complete & ask any necessary questions