IGCSE Biology Notes: Inheritance & Genetics
IGCSE biology notes on inheritance need Punnett square practice, allele definitions, and a clear mitosis vs meiosis comparison table.
Hub: IGCSE biology notes · Inheritance exam tips · Variation guide.
Genetics note sections
| Section | Key terms |
|---|---|
| DNA | Double helix, bases A-T C-G (pairing) |
| Genes & alleles | Dominant, recessive, homozygous, heterozygous |
| Meiosis | Genetic variation — crossing over (if required) |
| Selection | Natural vs artificial — one example each |
Worked crosses
Keep three solved Punnett examples in notes (mono, dihybrid if Extended).
Frequently asked questions
Sex-linked inheritance?
Add if on Extended — check syllabus.
Genetic engineering notes?
See biotechnology guide — separate page.
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