Edexcel IGCSE Biology topic guide
Reproduction and inheritance questions
Connect reproduction with the inheritance of genes, and explain how variation can lead to evolutionary change.
Reproduction and inheritance topic overview
Reproduction and inheritance connects sexual and asexual reproduction with genetics, variation, natural selection and the molecular basis of inheritance.
Keep biological stages in order, distinguish genes from alleles and chromosomes, and show every genetic cross or probability step clearly before interpreting the result.
Question types in reproduction and inheritance
- Comparisons of sexual and asexual reproduction in plants and animals.
- Genetic diagrams, pedigrees and probability calculations using alleles and genotypes.
- Questions about DNA, chromosomes, protein synthesis, mutation and variation.
- Explanations of natural selection, evolution and selective pressures.
Reproduction and inheritance subtopics
Choose a subtopic for its syllabus points, answering guidance and worked exam questions.