Lesson 3.3 - Traits and Reproduction

Open Ended

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

Multiple Choice

Greg’s gene versions for silk stickiness are:

• S1S1

• S2S2

• S1S2

Multiple Choice

Greg’s trait for silk stickiness is:

• Sticky

• Not Sticky

Multiple Choice

Anne’s gene versions for silk stickiness are:

• S1S1

• S2S2

• S1S2

Multiple Choice

Anne’s trait for silk stickiness is:

• Sticky

• Not Sticky

Draw

Make Predictions
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. Be prepared to share your predictions with the class.

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Multiple Choice

Otis’s gene versions for body color are:

• C1C1

• C2C2

• C3C3

• C1C3

• C2C3

Multiple Choice

Otis’s trait for body color is:

• Brown

• Yellow

• Colorless

Multiple Choice

Ruby’s gene versions for body color are:

• C1C1

• C2C2

• C3C3

• C1C3

• C2C3

Multiple Choice

Ruby’s trait for body color is:

• Brown

• Yellow

• Colorless

Draw

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.

Draw

Mate Otis and Ruby. Record the offspring's gene versions and body color in the table.

Draw

Mate Otis and Ruby. Record the offspring's gene versions and body color in the table.

Draw

Goal: Using venom as an example, show how the gene versions of siblings can be different from each other and from their parents.

Do:

• Create a model that shows how the offspring could have different combinations of gene versions.

• Also draw and label the proteins each spider likely has in their cells.

• Add annotations to explain how each spider offspring received those gene versions and proteins.

Tips:

• Try to use the following science words in your annotations: proteins, traits, gene versions, heterozygous, homozygous, and sexual reproduction.

Multiple Choice

An offspring cannot have a trait if neither of its parents have it.

Do you agree or disagree with this statement now?

• Agree

• Disagree

Open Ended

What evidence supports your ideas about the statement?

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Open Ended

How is asexual reproduction different from sexual reproduction?

Open Ended

How does a sea anemone reproduce asexually?

Open Ended

Why doesn’t asexual reproduction result in variation among offspring?