Factors affecting growth and development — AQA Education QCF Health & Social Care Revision
This subtopic examines how inherited genetic traits and environmental conditions independently and jointly shape human development from conception to old a
Topic Synopsis
This subtopic examines how inherited genetic traits and environmental conditions independently and jointly shape human development from conception to old age. It explores the interplay between nature and nurture, emphasizing that most developmental outcomes result from dynamic gene-environment interactions rather than either factor in isolation.
Key Concepts & Core Principles
- Life stages: Infancy (0-2), Early childhood (3-8), Adolescence (9-18), Early adulthood (19-45), Middle adulthood (46-65), Later adulthood (65+). Each has distinct PIES milestones.
- Nature vs. nurture debate: How genetic inheritance (nature) and environment (nurture) interact to shape development. Key studies include twin studies and the effects of deprivation.
- Major theories: Piaget (cognitive stages), Erikson (psychosocial crises), Bowlby (attachment), and Maslow (hierarchy of needs). Know the key features and criticisms of each.
- Factors affecting development: Genetic (e.g., Down syndrome), biological (e.g., diet, illness), social (e.g., family, peers), economic (e.g., poverty), and environmental (e.g., pollution).
- Life events: Expected (e.g., starting school) and unexpected (e.g., accident). Their impact depends on timing, support, and coping strategies.
Exam Tips & Revision Strategies
- For top marks, always move beyond description to analysis by using phrases like 'the extent to which' or 'this suggests an interaction because'.
- In extended writing, structure paragraphs around distinct genetic, environmental, and interactional points, ensuring each is supported by a well-chosen example from the lifespan.
- Use relevant research studies (e.g., Caspi et al. on MAOA gene and childhood maltreatment) to demonstrate depth in the interaction analysis.
- Define key terms (genotype, phenotype, epigenetics) early in your response to show clear conceptual understanding and secure high AO1 marks.
Common Misconceptions & Mistakes to Avoid
- Treating genetic and environmental factors as completely separate categories without acknowledging their interdependence.
- Describing environmental factors in overly vague terms (e.g., 'bad upbringing') without specifying measurable influences like housing quality or parenting style.
- Failing to provide concrete examples when explaining the interaction, such as how a genetic risk for obesity is exacerbated by an obesogenic environment.
- Overstating the deterministic role of genetics, ignoring evidence from twin and adoption studies showing environmental modification of genetic traits.
Examiner Marking Points
- Award credit for clearly differentiating between genetic factors (e.g., chromosomal abnormalities, inherited conditions) and environmental factors (e.g., socioeconomic status, family dynamics, pollution).
- Reward responses that provide specific, accurate examples of genetic factors such as Down syndrome, cystic fibrosis, or genetic predispositions to mental illness.
- Credit explanations that detail environmental influences like access to healthcare, educational opportunities, peer relationships, or cultural norms, with explicit links to developmental outcomes.
- Expect analysis of gene-environment interaction to go beyond simple addition, e.g., explaining how phenylketonuria (PKU) requires both the genetic mutation and dietary phenylalanine to cause intellectual disability.
- Look for use of conceptual frameworks like diathesis-stress model, epigenetic changes, or niche-picking in adolescence to illustrate interaction.