NS: 3.1 (2/3) Version B

Objective: SWBAT describe how mutations can perpetuate certain traits over time in order to explain how new traits are introduced to a population

Do Now: 

0

(Left: mutaitons; Right: without mutations)

What similarities and differences do you notice in what happened to the population with mutations and to the population without mutations?

Exit Ticket Review: 

Student 1: Exemplar

Student 2: Approaching

Vocabulary:
Mutation: a random change to a gene that sometimes results in a new trait.
Natural Selection: the process by which the distribution of traits in a population changes over many generations

Practice:

0

Investigating Mutant Fur Traits in the Sim
In the Sim activity that follows, you will investigate a low-fur population of ostrilopes with the trait distribution shown in the histogram below.
In the Sim, you will be able to turn on mutations for fur traits.
You will make the environment for this population WARM.
Before you do this, study the histogram below and answer the questions that follow.
Think about which new traits would be adaptive and non-adaptive in a cold environment. Label any traits that would be adaptive with an A. Label any traits that would be non-adaptive with an NA.

0

Are all traits that are introduced by mutations adaptive?
CFS:
accurately identifies the traits in the environment
accurately describes the adaptive or non-adaptive nature of the traits in the environment

"I think that ALL mutations (are/are not) adaptive. I think this because ... "

(THINK: are random traits always good? )

0

What will allow certain traits to become more common in the warm enironment above?

CFS:
accurately identifies factors that impact trait distribution and variation
accurately describes how adaptive traits spread in a population
"I know that adaptive traits spread because ... "

Exit Ticket:

Open the Natural Selection Simulation and open the mode: Mutations and Traits.
Change the temperature of the environment to cold (Level 1) by moving the Temperature slider.
Turn ostrilope fur-trait mutations on by pressing the Ostrilope icon and pressing the Mutations toggle.
Press RUN and observe the population for at least 50 generations.
Press ANALYZE and use the Generations slider to carefully observe new traits in the population.

ANALYZE the Generations slider to carefully observe new traits in the population.

2

Identify the adaptive traits and describe how do you know the traits you indicated in the above histogram were adaptive?
CFS:
accurately identifies the traits in the environment
accurately describes the adaptive or non-adaptive nature of the traits in the environment
"I think that the adaptive traits are ... . I know they are adaptive because ... "

(THINK: what triats are best for the cold environment?)

0

Identify and list the traits introduced by a mutation?

CFS:
accurately identifies the traits in the environment
accurately describes the adaptive or non-adaptive nature of the traits in the environment
The triats introduced by a mutation are ..

(THINK: what triats are different than the ones in generation 1..)

0

Why do you think non-adaptive traits can be introduced into a population through mutations?
CFS:
accurately identifies the how mutations impact a gene pool
accurately describes the adaptive or non-adaptive nature of the traits in the environment

NS: 3.1 (2/3) Version B

Objective: SWBAT describe how mutations can perpetuate certain traits over time in order to explain how new traits are introduced to a population

Do Now:

(Left: mutaitons; Right: without mutations)What similarities and differences do you notice in what happened to the population with mutations and to the population without mutations?

Practice:

What will allow certain traits to become more common in the warm enironment above?CFS:accurately identifies factors that impact trait distribution and variationaccurately describes how adaptive traits spread in a population"I know that adaptive traits spread because ... "

Exit Ticket:

Why do you think non-adaptive traits can be introduced into a population through mutations?CFS:accurately identifies the how mutations impact a gene pool accurately describes the adaptive or non-adaptive nature of the traits in the environment

Objective: SWBAT describe how mutations can perpetuate certain traits over time in order to explain how new traits are introduced to a population

Do Now:

(Left: mutaitons; Right: without mutations)What similarities and differences do you notice in what happened to the population with mutations and to the population without mutations?

Practice:

What will allow certain traits to become more common in the warm enironment above?CFS:accurately identifies factors that impact trait distribution and variationaccurately describes how adaptive traits spread in a population"I know that adaptive traits spread because ... "

Exit Ticket:

Why do you think non-adaptive traits can be introduced into a population through mutations?CFS:accurately identifies the how mutations impact a gene pool accurately describes the adaptive or non-adaptive nature of the traits in the environment

(Left: mutaitons; Right: without mutations)

What similarities and differences do you notice in what happened to the population with mutations and to the population without mutations?

What will allow certain traits to become more common in the warm enironment above?

CFS:
accurately identifies factors that impact trait distribution and variation
accurately describes how adaptive traits spread in a population
"I know that adaptive traits spread because ... "

Why do you think non-adaptive traits can be introduced into a population through mutations?
CFS:
accurately identifies the how mutations impact a gene pool
accurately describes the adaptive or non-adaptive nature of the traits in the environment

(Left: mutaitons; Right: without mutations)

What similarities and differences do you notice in what happened to the population with mutations and to the population without mutations?

What will allow certain traits to become more common in the warm enironment above?

CFS:
accurately identifies factors that impact trait distribution and variation
accurately describes how adaptive traits spread in a population
"I know that adaptive traits spread because ... "

Why do you think non-adaptive traits can be introduced into a population through mutations?
CFS:
accurately identifies the how mutations impact a gene pool
accurately describes the adaptive or non-adaptive nature of the traits in the environment