Key term for Edexcel GCSE Biology, used in Inheritance.
The 23rd pair of chromosomes in humans (XX or XY) that determine the biological sex of an individual.
Sex chromosomes appears in Edexcel GCSE Biology revision content for Genetics, especially Inheritance and Sex Determination.
Create a free account to access Edexcel GCSE Biology revision notes, track progress, and practise related key terms.