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11.30_6thSci_TR 3.3

Last updated almost 3 years ago
9 questions
Objectives and Slides
TR 3.3 Analyzing Variation and Reproduction
KWBAT use a simulation to make and test predictions regarding inheritance of gene versions.
Part 1

Part 1: Do Now


Use the diagram to explain how the offspring receives two copies of each gene. Refer to the word bank when writing your response.

WORD BANK: Genes, Offspring, Inherit, Parent
0

How do offspring receive two copies of each gene?

Use Q7 from TR 3.2 to help you.

0

In the previous lesson, we reviewed one of the claims for why traits for silk flexibility vary within the spider family:

Claim 2: The offsprings’ traits depend on which parent the offspring inherited more copies of genes from.

You may have heard something similar yourself; if you look more like one of your parents, someone might say “looks like you got more of your father’s genes!”

Explain why this statement is incorrect.

Part 2

Part 2: Making Predictions About Inheritance for Silk Stickiness with Greg and Anne

Now that we’ve explored where offspring get their genes from, we’re going to make predictions for what traits offspring will have based on their parent’s genes.




1

Use the information about Greg and Anne’s gene versions to make predictions about all the possible gene combinations the offspring could inherit for the feature of silk stickiness.

The possible gene versions are:
S1S1 - Sticky
S1S2 - Sticky
S2S2 - Not Sticky

The possible traits are:
Sticky
Not Sticky

1

Why was there variation (differences) among the offspring? Why did offspring end up with different gene versions?

Sentence stater:
There was variation among the offspring because....

0

Do you think the results will be the same every time you run the sim? Explain what you think.

Sentence stater:
I think the results (will/will not) be the same every time I run the sim because...

Part 3

Part 3: Testing Predictions About Inheritance for Body Color with Otis and Ruby

Now that we’ve explored where offspring get their genes from, we’re going to make and test predictions for what traits offspring will have based on their parent’s genes.



1

Make Predictions: Use the information about Otis and Ruby’s gene versions to make predictions about all the possible gene combinations the offspring could inherit for the feature of body color.

The possible gene versions are:
C1C2 - Brown
C1C3 - Brown
C3C2 - Yellow
C3C3 - Colorless

The possible colors are:
Brown
Yellow
Colorless

LINK TO SIM https://learning.amplify.com/traitsandreproduction/#/

Remember, #6 was to PREDICT.


Now you will TEST two times using the simulation!

Reset the sim BEFORE you do your second test.


Run the sim using Otis and Ruby as the parents for both tests.

1

TEST Predictions #1: Use the information about Otis and Ruby’s gene versions to test your predictions about all the possible gene combinations the offspring could inherit for the feature of body color.

This information should be gathered from your Simulation!!

You will complete two tests to see if your predictions were correct!

Reminder to RESET your sim before testing second time!

1

TEST Predictions #2: Use the information about Otis and Ruby’s gene versions to test your predictions about all the possible gene combinations the offspring could inherit for the feature of body color.

This information should be gathered from your Simulation!!

You will complete two tests to see if your predictions were correct!

0

Did you ever end up with an offspring that did not share its parents’ traits for body color? Describe it.

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