The Darwin’s bark spider on the left makes proteins that result in spider silk with high flexibility.

The Darwin’s bark spider on the right makes proteins that result in spider silk with low flexibility.

Both have the same parents.

Predict: Using the space below, Why do organisms make different proteins?

If two birds have the same protein for feather color, how must their proteins be functioning inside the cell?

What Spider and what feature did you observe?

What did you observe in the cell when you changed the spider’s gene versions?

Sentence Stem:

I noticed that when I changed the spider's gene versions...

Do you think what you observed is evidence that genes are instructions for proteins? Why or why not?

(Hint: Did the trait change when you changed the gene? Why did the trait change?)

How many proteins are needed for your blood to clot?

How do doctors treat people with hemophilia?

Summarize this paragraph in 1-2 sentences.

As long as the cell has the gene with instructions to make a protein, the cell will make the protein.

Where are genes located in each cell?

What do you observe in the cell when Anne’s gene versions are changed in Scenario B?