Chromosomes are thread-like structures located inside the nucleus of animal and plant cells. Each chromosome is made up of protein and a single molecule of DNA contains the specific instructions that make each type of living creature unique. Males and females differ in a pair of chromosomes known as the sex chromosomes. Females have two X chromosomes (XX) in their cells, while males have one X and one Y chromosome (XY).

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    Gender: AQA A Level Psychology Topic Companion

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    Gender: AQA A Level Psychology Unit Assessment Edition 1

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    Gender: Topic Assessments for AQA A-Level Psychology

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