Cell Organelles and Their Jobs (Part 4)

What You'll Learn

Mutations are changes in DNA sequence that can occur randomly. Most mutations have no effect, some are harmful, and a few may be beneficial and help a species adapt.

Key Words

species
heredity

Materials Needed

microscope (or magnifying glass)
slides
onion skin
iodine stain

Safety First

Dispose of materials properly after the experiment.
Handle glass items carefully to avoid breakage.

Steps

Step 1 — Read

Read and learn: Mutations are changes in DNA sequence that can occur randomly. Most mutations have no effect, some are harmful, and a few may be beneficial and help a species adapt.

Step 2 — Do

Gather your materials and set up your workspace.

Step 3 — Observe

Use your senses (except taste) to describe what you notice.

Step 4 — Record

Write a summary of your findings in 3-5 sentences.

Check Your Understanding

Question 1

1 of 3

What organelle produces energy for the cell?