Question

1. the normal and mutation instructions for step 6 are the same. carla did this intentionally. what was carla trying to show about mutations by including the same directions in both columns?

a. they are always harmful to cells and affect and organism’s traits.
b. they are sometimes repaired before they can affect an organism’s traits.
c. they are caused by mutagens, so they usually change and organism’s traits.
d. they are permanent changes in dna but don’t change and organism’s traits.

Explanation:

By making the normal and mutation step instructions identical, Carla is demonstrating that some DNA mutations do not result in a change to the organism's observable traits, even though the DNA itself has a permanent alteration. This matches the idea that not all mutations affect the expressed characteristics of an organism.

Answer:

D. They are permanent changes in DNA but don't change an organism's traits.