Human body cells contain 46 chromosomes.
Explain how meiosis keeps the number of chromosomes in human body cells the same from one generation to the next.
Two brothers have the same parents. The brothers are not identical twins.
Explain why the brothers are genetically different.
40 exam-style questions on Edexcel GCSE Biology 3.1 Reproduction and meiosis, covering 3.1.1 Advantages and disadvantages of reproduction and 3.1.2 Role of meiotic cell division. Each one has a worked solution and a mark scheme showing where the marks go.