Classify DNA mutations

Free printable Grade 8 science worksheet for "Classify DNA mutations" — practice gene mutations. No-prep, print or assign online.

This middle-school Life Science worksheet guides students through the classification of DNA mutations — including substitutions, insertions, and deletions — and their potential effects on gene expression and protein function. Teachers can use it as a structured companion to a genetics lesson, helping students distinguish mutation types before exploring their consequences for living organisms. It builds the molecular biology literacy students need to engage with topics such as genetic disease, evolution, and biotechnology.

Science

Life Science

Middle School

Worksheets

Ages 11–14

hard

Learning objectives

Classify DNA mutations by type: substitution, insertion, or deletion
Explain how each mutation type can alter a gene's coding sequence
Connect specific mutations to potential effects on protein structure and function

Answer Key

How to use this worksheet

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