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Combined Science
AQA GCSE Combined Science Trilogy
Inheritance, Variation and Evolution
Reproduction
Sex Determination
AQA GCSE Combined Science Trilogy · 8464
Sex Determination
What you need to know
Understand that ordinary human body cells contain 23 pairs of chromosomes, with one specific pair determining biological sex.
Identify the sex chromosome combinations for females (XX) and males (XY).
Construct genetic crosses to accurately demonstrate the inheritance of sex in humans.
Calculate and use direct proportions and simple ratios to express the likelihood of sex inheritance outcomes.
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Sex Determination
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Inherited Disorders
Next topic: Variation and Evolution
Variation
