Punnett Squares

Lab Brief #5

🎯 Your mission

Run the experiment. Find out what really happens.

⚡ The twist

Nature loves to surprise the careful watcher.

What you'll learn

Punnett squares are tools for predicting the probability of offspring inheriting particular traits. They show all possible combinations of alleles from two parents.

Key words

trait
A feature of a living thing, like eye color or height.

Make a hypothesis first

Before you start: write down what you think will happen, and why.

Say your guess out loud — then find out if you were right.

Get ready

🧰 What you need

colored pencils

⚠️ Safety first

Have an adult check your set-up before you start, and tidy everything away afterwards.

Step 1 of 4 · Read

Look at the vocabulary words and write a definition for each in your own words.

Step 2 of 4 · 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 of 4 · Observe

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

Step 4 of 4 · Record

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

Question 1 of 2

What is a Punnett square used for?

How sure are you?😐 maybe

Question 2 of 2

What is a dominant trait?

How sure are you?😐 maybe

Mind = blown

🔬 The more you look, the more nature shows you.

Nice work!

You got 0 of 2 right.

Next: Cell Organelles and Their Jobs All lessons

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✨ More to explore

🌍 Where you see this in real life: This shows up in your everyday life more than you'd think.

🏆 Stretch challenge (try it this week): Try one experiment in real life this week — even a tiny one.

👨‍👩‍👧 For the dinner table: “What's the most surprising thing you learned today?”

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