DNA, Genes, Chromosomes & Mutations Worksheet – Genetics

Help students build a clear understanding of DNA, genes, chromosomes and mutations with this ready-to-use genetics worksheet resource.

This resource introduces the relationship between DNA, genes, chromosomes and the nucleus before moving on to the causes and types of mutations. Students review key genetics vocabulary, identify structures in diagrams and apply their understanding of mutations to DNA sequence examples.

What’s Included?

DNA, Genes & Chromosomes Worksheet

Identify the nucleus and understand its role in the cell
Understand the function of DNA
Identify what DNA stands for
Recognise the double-helix structure of DNA
Understand the relationship between DNA, genes and chromosomes
Review the number of chromosomes in humans
Explore characteristics controlled by genes
Label cell, nucleus, gene and chromosome diagrams

Mutations Worksheet

Identify where mutations occur
Understand when mutations can be passed to offspring
Identify deletion, substitution and insertion mutations
Define mutagens
Identify physical, chemical and biological mutagens
Review point and frameshift mutations
Explore whether all mutations are harmful
Apply mutation concepts to DNA sequence examples

Perfect For
KS3 Biology
KS4 / GCSE Biology revision
Genetics and inheritance units
DNA and chromosome lessons
Mutation lessons and review
Homework
Independent practice
Classroom assessment
Revision and test preparation
Science cover work
Learning Objectives

Students will develop their understanding of:

DNA and its role in cells
The relationship between DNA, genes and chromosomes
The structure and organisation of genetic material
Mutations and different mutation types
Mutagens and their possible effects
How mutations can affect genetic information
The difference between inherited and non-inherited mutations
Resource Features
6 pages
Student worksheets
Diagram labelling activities
DNA sequence and mutation practice
Answer key included
Printable PDF
Editable Google Docs version

A flexible, low-preparation resource for introducing, practising or reviewing key genetics concepts in secondary Biology.