HSC Biology Notes: Modules 5–8 and Scientific Skills

These HSC Biology notes organise the four NSW Year 12 modules: Heredity, Genetic Change, Infectious Disease, and Non-infectious Disease and Disorders. Each module has its own notes page with detailed explanations, examples and diagrams. This overview introduces their scope and points to the Working Scientifically skills in each module.

Syllabus: these notes address the Biology Stage 6 Syllabus (2017), used for the 2026 and 2027 HSC. The new Biology syllabus starts in Year 11 in 2027 and has its first HSC examination in 2028.

The HSC Biology past-papers guide provides the official exam and marking-guideline links. The module pages explain the content; the Working Scientifically section below links to the skills practice in each module.

Key Takeaways

• Module 5: Heredity connects reproduction, DNA, protein synthesis and inheritance.
• Module 6: Genetic Change explains mutation, gene pools, biotechnology and genetic technologies.
• Module 7: Infectious Disease connects pathogens and transmission to host responses and disease control.
• Module 8: Non-infectious Disease and Disorders covers internal regulation, disease patterns and technologies that assist organ function.
• Working Scientifically includes evaluating investigations, interpreting data and judging what evidence supports.
• These are Year 12 notes for the 2017 syllabus through the 2027 HSC.

Contents

• Module 5: Heredity
• Module 6: Genetic Change
• Module 7: Infectious Disease
• Module 8: Non-infectious Disease and Disorders
• Working Scientifically
• Biology tutoring in Blacktown
• Frequently asked questions

A biological explanation connects a structure or process to an outcome. Evidence shows whether that explanation fits the situation.

What do Biology Module 5 notes cover?

Module 5 connects reproduction and cell division with DNA, polypeptide synthesis and inheritance. The full notes explain how genetic information is copied and passed on, how existing alleles are rearranged, and how genotype and environment contribute to phenotype. They include the examples, diagrams and qualifications for pedigrees and genetic comparisons.

Read the complete HSC Biology Module 5 notes: Heredity.

What do Biology Module 6 notes cover?

Module 6 explains mutation and changes in gene pools, then examines biotechnology and genetic technologies. The full notes distinguish changes in DNA from their possible effects on organisms and populations. They retain the examples of reproductive technologies, recombinant DNA, agricultural applications and genome editing, including the limits of the evidence used to evaluate them.

Read the complete HSC Biology Module 6 notes: Genetic Change.

What do Biology Module 7 notes cover?

Module 7 follows the relationship between pathogens, transmission, host responses and disease control. The full notes explain infection and disease, plant and animal defences, immune responses, and prevention and treatment. Named examples and population evidence show why an intervention must be evaluated against the process it is intended to interrupt.

Read the complete HSC Biology Module 7 notes: Infectious Disease.

What do Biology Module 8 notes cover?

Module 8 connects homeostasis with the causes and effects of non-infectious disease. The full notes explain regulatory mechanisms, epidemiological evidence and prevention, then consider technologies that support hearing, vision and kidney function. The examples keep the distinctions between association and causation, and between restoring a function and replacing every role of an organ.

Read the complete HSC Biology Module 8 notes: Non-infectious Disease and Disorders.

How do Working Scientifically skills apply to HSC Biology?

Working Scientifically is the set of skills behind every Biology question. You use them to ask a testable question, plan a fair investigation, collect data, analyse it, judge how good the evidence is and communicate your conclusion. HSC questions often test these skills on unfamiliar material, such as a graph, an organism you have never met or someone else’s results, so memorised facts alone are not enough.

Each module page teaches these skills with its own topic, so you practise them on the biology you are learning:

• Module 5: Heredity
• Module 6: Genetic Change
• Module 7: Infectious Disease
• Module 8: Non-infectious Disease and Disorders

The official Biology syllabus sets out the Working Scientifically outcomes alongside the module content.

Biology tutoring in Blacktown

Our Year 12 Biology classes in Blacktown teach the concepts and provide feedback on how students apply them. Classes have 1–5 students. See current pricing or enquire about a free trial.

Students building the earlier foundations can find our Year 11 Biology classes. The two year groups cover different course content.

Which sources support these HSC Biology notes?

The course boundary follows NESA’s Biology Stage 6 Syllabus (2017). Scientific explanations are cross-checked against available relevant chapters of Pearson Biology 12 New South Wales (2019, ISBN 9781488619267) and Biology in Focus Year 12, second edition (ISBN 9780170408851), alongside the scientific sources linked in each section. Textbook diagrams and exercises are not reproduced here.

Frequently Asked Questions