Mitosis: How Cells Divide (Part 4)

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

slides
onion skin
iodine stain
paper
colored pencils

Safety First

Handle glass items carefully to avoid breakage.

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?