In mammals, biological sex is determined at fertilisation by the inheritance of sex chromosomes.
Explain how sex chromosomes determine whether a human zygote develops as male or female, and state which parent's gamete determines this outcome.
Cell division occurs via mitosis and meiosis at different stages of a mammalian life cycle. Describe four differences between the daughter cells produced by meiosis and those produced by mitosis.
66 exam-style questions on Edexcel IGCSE Biology Inheritance. Each one has a worked solution and a mark scheme showing where the marks go.