What you'll learn
Cells, inheritance and staying healthy.
Key ideas
- Cells and enzymes; DNA, genes, alleles and genetic crosses.
- Pathogens, the immune system, vaccination and antibiotics.
Exam tips
- Use a Punnett square for ratios.
- Explain how vaccines create immunity.
Common mistakes
- Confusing genotype and phenotype.
- Saying antibiotics kill viruses.