In birds, biological sex is determined by the Z and W sex chromosomes, rather than the X and Y chromosomes found in mammals.
Explain how these sex chromosomes determine whether a chick is born male or female, and state which parent's gamete determines this sex.
The growth of a chick and the subsequent production of its gametes rely on different types of cell division: mitosis and meiosis. 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.