Edexcel International GCSE Biology, topic 3
Reproduction and inheritance
This topic is about how organisms reproduce and how characteristics are passed from parents to offspring. It covers sexual and asexual reproduction in flowering plants and humans, then DNA, genes and protein synthesis, patterns of inheritance, and how mitosis, meiosis and random fertilisation lead to genetic variation.
Revision notes
Worksheet
FlashcardsSubtopics
Work through them in order. Each one has notes, exam questions and flashcards, and a PDF of each.
- 1Sexual and asexual reproduction, and reproduction in plants Spec 3.1–3.7Sexual and asexual reproduction, flower structure, pollination, fertilisation, seeds, germination and asexual reproduction in plants.NotesQuestions 8Flashcards 14
- 2Human reproduction Spec 3.8–3.13The male and female reproductive systems, the menstrual cycle and its hormones, the placenta, amniotic fluid and secondary sexual characteristics.NotesQuestions 7Flashcards 15
- 3DNA, genes and protein synthesis Spec 3.14–3.18BThe genome, genes and chromosomes, and (Biology only) the structure of DNA, RNA and how a gene is used to make a protein.NotesQuestions 6Flashcards 9
- 4Inheritance Spec 3.19–3.27Alleles, dominant and recessive, codominance, genetic diagrams, family pedigrees, probability and how sex is inherited.NotesQuestions 7Flashcards 13
- 5Cell division, variation and evolution Spec 3.28–3.39Mitosis and meiosis, genetic and environmental variation, mutation, natural selection and antibiotic resistance.NotesQuestions 7Flashcards 15
Whole topic
When you have done the subtopics: test yourself on everything, or print the lot.