Mitosis: How Cells Divide (Part 3)

What You'll Learn

Chromosomes are structures made of tightly coiled DNA and proteins. Human body cells have 46 chromosomes (23 pairs), while sex cells have 23 chromosomes.

Key Words

gene
chromosome

Materials Needed

tape
index cards
markers
ruler
scissors
microscope (or magnifying glass)

Safety First

Clean up spills immediately to prevent slipping.
Use materials only as directed in the experiment.
Keep small objects away from young children.

Steps

Step 1 — Read

Read and learn: Chromosomes are structures made of tightly coiled DNA and proteins. Human body cells have 46 chromosomes (23 pairs), while sex cells have 23 chromosomes.

Step 2 — Do

Create a labeled diagram of what you built or observed.

Step 3 — Observe

Draw a picture of what you observe.

Step 4 — Record

Answer the questions based on your data.

Check Your Understanding

Question 1

1 of 3

What is mitosis?