Meiosis: Making Sex Cells (Part 3)

What You'll Learn

Meiosis is a special type of cell division that produces sex cells (gametes) with half the normal number of chromosomes. When egg and sperm unite, the full number is restored.

Key Words

gene
chromosome
mitosis

Materials Needed

microscope (or magnifying glass)
slides
onion skin
iodine stain
paper
colored pencils

Safety First

Keep small objects away from young children.
Work in a well-ventilated area when using vinegar or other strong-smelling substances.
Dispose of materials properly after the experiment.

Steps

Step 1 — Read

Read about Heredity and write down three key facts.

Step 2 — Do

Create a Punnett square to predict the offspring of two parents. Use a trait like eye color or seed shape. Calculate the probability of each outcome.

Step 3 — Observe

Compare the before and after states.

Step 4 — Record

Write your conclusion: did the results match your hypothesis? What would you change next time?

Check Your Understanding

Question 1

1 of 3

What is meiosis?