

This fully resourced lesson introduces students to selective breeding through clear explanations, engaging visuals, real-life examples and structured activities. Designed for GCSE Combined Science (AQA) but easily adaptable for other exam boards and KS3, this lesson guides students through how selective breeding works, why it is used, and the biological consequences of inbreeding and reduced genetic variation.
The lesson includes:
- A detailed, student-friendly explanation of selective breeding
- High-quality diagrams (including parent–offspring trait inheritance and dog-breed variation)
- A range of examples from both plants and animals
- Discussion of advantages and disadvantages, including reduced genetic diversity and inbreeding
- A 6-mark exam-style question with model answer and mark scheme
- A 10-question plenary with full answer sheet
- Key vocabulary: allele, variation, desirable traits, inbreeding, genetic diversity
This resource is designed for no additional preparation and is suitable for:
✔ Full lessons
✔ Cover lessons
✔ Revision sessions
✔ Homework tasks
✔ Tutoring and intervention
This lesson makes a sometimes abstract topic accessible, visual and memorable. Perfect for helping students develop strong exam-ready explanations and scientific reasoning.
These resources are designed to minimise printing, allowing teachers to reuse sheets while students complete all tasks in their exercise books or on separate paper.
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