Group 2: Evolution
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Group 2: Evolution. Fordham University: Rose Carlson Evon Hekkala Gerard Iwantsch Yale University: Tiffany Tsang Andy Phillips. Facilitators: Marvin O’Neal III and Carl Hashimoto. Evolution teaching tidbit.

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Group 2: Evolution

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Group 2 evolution

Group 2: Evolution

Fordham University:

Rose Carlson

Evon Hekkala

Gerard Iwantsch

Yale University:

Tiffany Tsang

Andy Phillips

Facilitators: Marvin O’Neal III and Carl Hashimoto


Framework of teachable unit evidence for evolution

Evolution teaching tidbit

Who? How many?Introductory biology for majors (freshmen). 60-75 students.

Background?

Co-requisites of chemistry and calculus.

Some understanding/knowledge of nomenclature from high school biology (expected to vary among students).

1

1

Framework of Teachable Unit (Evidence for evolution)

2

2

3

1-2 hours of class time

Core Terminologies, Concepts, History

Teaching Tidbit

Concluding Remarks


Group 2 evolution

Framework

Learning Goals for the teaching unit :

In this unit, students will:

  • Understand that variation exists within a population.

  • Understand the concept of selection.

  • Understand that organisms evolve over multiple generations (i.e. time).

  • Be able to evaluate evidence for evolution.

  • Dispel the misconception that individuals evolve.


Group 2 evolution

GOAL: Understand that natural selection acts on existing variation in a population.

Learning Objectives:

1. Be able to construct a concept map using the terms evolution, variation, time, selection, and reproduction.

2. Be able to identify and then describe the steps that one would take to domesticate a wild species.


Group 2 evolution

Do Individuals Evolve?

Use your clickers to choose one answer:

A = YesB = No


Group 2 evolution

The idea that an individual changes in response to natural selection is a common misconception in evolutionary biology.

stretches its neck and passes this change on to its offspring

long-necked individuals

lots of time

short-necked individual

Lamarck


Group 2 evolution

The idea that an individual changes in response to natural selection is a common misconception in evolutionary biology.

stretches its neck and passes this change on to its offspring

long-necked individuals

lots of time

short-necked individual

Lamarck

descendent population with, on average, longer necks

lots of time

natural selection favors longer necks

original population showing variation in neck length

Darwin


Group 2 evolution

How did we get a Maltese from a wolf?

Trivial Pursuit factoid: this only took about 15000 years…


Group 2 evolution

Artificial selection

intentional breeding (by humans) of animals or plants for certain traits.


Group 2 evolution

Artificial selection: wolves to many breeds of dogs.

wolf ancestor


Group 2 evolution

Artificial selection: Brassica to broccoli.


Group 2 evolution

Activity (5 minutes)

  • Construct a concept map with a partner using the following terms: time, evolution, reproduction, variation, and selection.

Remember how to draw a concept map?


Group 2 evolution

One possible concept map…

selection

on

variation

+/-

time

reproduction

evolution/

Δ variation


Group 2 evolution

Domestication

  • a process by which a population of organisms

  • becomes

  • adapted to the captive environment,

  • occurring over generations

artificial selection is the selective force in domestication


Group 2 evolution

Which of these images is an example of domestication? (Use your clickers to select one answer).

A.

B.

C.

D.


Group 2 evolution

From wild foxes to domesticated foxes

in 30 generations flat!

  • Describe how the Russian scientists domesticated the foxes.

THINK (for 1 minute)


Group 2 evolution

From wild foxes to domesticated foxes

in 30 generations flat!

  • Describe how the Russian scientists domesticated the foxes.

THINK (for 1 minute)

PAIR, and SHARE


Group 2 evolution

REVIEW: the key elements required for domestication.

  • A population with existing (heritable) variation

  • A human-induced selective force

  • Multiple generations (i.e. time)


Group 2 evolution

Natural vs. artificial selection

  • The two types of selection are similar.

  • However, artificial selection works much more quickly because the selective forces are stronger and the changes tend to be directional


Group 2 evolution

Homework:Based on today’s material, think about which features of a species might make it easier or more difficult to domesticate.


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