Genetics and Behaviour

Overview

This 60-minute lesson is designed for Year 10 students, part of an 8-lesson unit titled Mind and Behaviour Exploration. The focus is on understanding the role genetics play in behaviour through the nature versus nurture debate. This lesson uses interactive case studies and discussion formats, encouraging critical thinking and application of knowledge aligned with UK educational standards.

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Curriculum Links and Standards

• Key Stage 4 PSHE & Science (Biology):
  • Understanding genetic inheritance and environmental influences on behaviour
  • Developing critical thinking and ethical reasoning skills
  • Engaging in discussions and reflecting on scientific and social issues
• British Psychological Society (BPS) School Curriculum Recommendations:
  • Promoting scientific literacy and understanding of biopsychosocial models
  • Encouraging enquiry-based learning about human behaviour
• UK National Curriculum (Science - Biology):
  • “Inherited traits are passed down from parents to their offspring” (National Curriculum, Year 9-11)
  • “How environmental factors can affect behaviours and health”

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Learning Objectives

By the end of the lesson, students will be able to:

1. Explain the concepts of nature and nurture in behaviour.
2. Analyse case studies to identify genetic and environmental influences on behaviour.
3. Evaluate arguments from both sides of the nature versus nurture debate.
4. Communicate ideas effectively through structured group discussion and debate.

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Resources Needed

• Printed student case study packets (3 different behavioural case studies — e.g. twin studies, adoption studies, extreme environments)
• Whiteboard and markers
• Personal mini whiteboards and markers for students
• Sticky notes for reflection points
• Projector for short video clips or presentation slides (optional)
• Reflection journal or exercise books

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Lesson Structure

0-5 mins | Introduction and Starter Activity

• Briefly introduce the topic with a real-world question: "Why do people behave differently even within families?"
• Starter mini-quiz on mini whiteboards: Define ‘nature’ and ‘nurture’ in one sentence each.
• Share a few responses; clarify key terms.

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5-20 mins | Direct Teaching: Nature vs. Nurture Overview

• Present concise information covering:
  • Definitions of nature (genetics) and nurture (environment).
  • Examples of behaviours influenced by genetics (e.g. temperament, certain disorders) and environment (e.g. upbringing, education).
  • Introduce historical perspectives and key research (e.g. twin studies, adoption studies).
• Use a short video clip or animated graphic to visualise gene-environment interaction.

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20-40 mins | Group Case Study Activity

• Divide class into 3 groups (4-5 students each). Assign one case study per group. Examples:
  1. Identical twins separated at birth.
  2. Environmental adversity affecting child development.
  3. Genetic predisposition to anxiety disorders and environmental triggers.
• Each case study includes data summaries, descriptions, and questions prompting students to identify genetic vs. environmental factors.
• Students discuss and prepare a 3-minute summary addressing:
  • What behaviours are likely influenced by genetics?
  • What environmental factors might be involved?
  • How nature and nurture might interact in this case.

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40-55 mins | Group Presentations and Whole-Class Discussion

• Each group presents their findings.
• Teacher facilitates a class debate:
  • “Is genetics more powerful than environment?”
  • Encourage respectful, evidence-based arguments.
  • Use probing questions to deepen analysis (e.g., "Could one factor compensate for the other? Can someone be ‘only’ influenced by genes?").

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55-60 mins | Reflection and Summary

• Distribute sticky notes for:
  • One new thing they learned.
  • One question they still have about genetics and behaviour.
• Collect sticky notes for review and inform next lesson planning.
• Close with summary emphasizing that behaviour is typically a complex interplay of genetics and environment.

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Differentiation & Inclusion Strategies

• Case studies are tiered for different reading levels and scaffolded with guiding questions.
• Mixed-ability groups to balance skills and encourage peer learning.
• Use visual aids and glossaries for terminology.
• Allow students to present orally or in written form to accommodate different strengths.

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Assessment for Learning

• Formative assessment through:
  • Mini whiteboard quiz at the start.
  • Monitoring group discussions and presentations for understanding.
  • Sticky note reflections to gauge learning and misconceptions.
• Teacher feedback focused on critical thinking and application of evidence.

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Extension Ideas

• Homework: Find a public figure or family example where nature vs nurture debate seems relevant and prepare a short written reflection or presentation.
• Follow-up lesson (Lesson 5): Cognitive and environmental influences on behaviour – deep dive into specific experiments (e.g. Bandura’s Bobo Doll).

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Teacher's Notes

• Emphasise respectful listening during debates; many behavioural traits are sensitive issues.
• Highlight that modern psychology favours interactionist approaches rather than strict dichotomy.
• Encourage students to think critically about real-life implications such as ethics in genetic research and social policies.

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This lesson encourages active engagement and critical thinking about a fundamental debate in psychology, matching the intellectual curiosity and maturity of Year 10 students while fulfilling UK curriculum expectations.