BIOLOGY

Monday

2 May 2016

Entry Task

What does it mean when a populations allele frequency

changes from 20% to 30%?

• The population is evolving.

Agenda

Entry Task

Housekeeping

Exam Study (Kahoot)

Housekeeping

Chapter 16/17 Exam on Tomorrow, May 3.

• 23 MC & 4 SA questions

Substitute teacher on Thursday, May 5.

Kahoot

Study questions for chapter 16/17 exam.

BIOLOGY

Tuesday

3 May 2016

Entry Task

Explain the principle of common descent.

• Organisms share a number of inherited characteristics

because they have evolved from a common ancestor.

Agenda

Entry Task

Housekeeping

Chapter 17 (Evolution of Populations)

Video: “Evolution at a Snail’s Pace”

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

Chapter 17 Evolution of

Populations

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?

Essential Question

How can populations evolve to form new species?

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.

17.3 I will be able to explain how natural selection affects

single gene and polygenic traits.

17.4 I will be able to explain different mechanisms of

speciation

Untamed Science Video

“Evolution at a Snail’s Pace”

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.

Section 17.1 Genes and

Variations

Genetics & Evolution

Genotype

• Genetic makeup (e.x. Bb, Rr)

Phenotype

• Physical characteristics of an organism (e.x. brown fur,

red petals)

pg. 482-483

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

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. 484-485

Traits

Single Gene Traits

• Traits controlled by only

one gene.

Polygenic Traits

• Traits controlled by two

or more genes.

pg. 485

BIOLOGY

Wednesday

27 Apr 2016

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

Agenda

Entry Task

Housekeeping

Protective Coloration Lab (Natural Selection)

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.

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.

BIOLOGY

Thursday

28 Apr 2016

Entry Task

What is the primary reason new species are formed?

(section 17.3)

• Reproductive Isolation

Agenda

Entry Task

Housekeeping

Protective Coloration Lab

Section 17.2

Section 17.3

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.

Lab

Protective Coloration:

• Review your data worksheet.

• Finalize concepts with group.

• Complete the graph and questions.

Section 17.2 Evolution as

Genetic Change in Populations

Natural Selection

Single Gene Traits:

• Can lead to changes in allele frequencies.

• Leads to changes in phenotype frequency.

pg. 488

Natural Selection

Polygenic Traits:

• Affects the relative fitness of phenotypes.

Produces on of three types of fitness:

• Directional Selection

• Stabilizing Selection

• Disruptive Selection

pg. 488-489

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

Section 17.3 Process of

Speciation

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

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

BIOLOGY

Friday

29 Apr 2016

Entry Task

Galapagos finches became ___________ ___________,

which led to ___________ creating two distinct species.

• Reproductive Isolation

• Speciation

Agenda

Entry Task

Chapter 17 Quiz 1

Housekeeping

Chapter 16/17 Study Guide

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.

Housekeeping

Chapter 16/17 Exam on Tuesday, May 3.

• 23 MC & 4 SA questions

Substitute teacher on Thursday, May 5.

Turn in your Protective Coloration Lab graph.

Exam Study Guide

Complete & ask any necessary questions