Science Worksheet · Grades 7–9
Punnett Squares Worksheet
A printable science worksheet for grades 7-9 on Punnett squares. Students learn to predict offspring with a genetic cross grid, read a worked Tt by Tt example, answer eight questions, and complete four problems. A complete answer key is included.
Subject
Science
Grades
Grades 7–9
Skill Focus
Punnett Squares, life science
Lesson Length
30 minutes
Lesson Overview
About this worksheet
A Punnett square predicts the possible offspring of a genetic cross. This worksheet shows a worked Tt by Tt cross in a grid and teaches students to read genotypes and phenotypes from it.
The reference box and Section A are on page 1. The reference box explains dominant and recessive alleles and shows a labeled Tt by Tt grid. Section A has eight questions about the grid. Section B on page 2 has four questions, including setting up a new cross.
Page 3 is a complete answer key with answers for every item. The worksheet pairs well with the Genetics and Heredity and Natural Selection worksheets.
How to Use This Lesson
Read the reference box and study the Tt by Tt grid.
Answer the eight questions in Section A on page 1.
Complete the four questions in Section B on page 2.
Use the answer key on page 3 for self-check.
Pair with the Genetics and Heredity Worksheet for the vocabulary.
Printable Resource
A classroom-ready PDF with everything in one printable resource.
Full Member Resource · Printable PDF · 3 pages · Answer Key
Punnett Squares Worksheet
A printable science worksheet for grades 7-9 on Punnett squares. Students learn to predict offspring with a genetic cross grid, read a worked Tt by Tt example, answer eight questions, and complete four problems. A complete answer key is included.
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