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GCSE Combined Science · key term
A chromosome belonging to the pair that carries genes determining biological sex. In the human inheritance model, females have XX and males have XY.
Used by AQA and Edexcel
Specification 4.6.1.6 · Paper 2
Revise: Sex DeterminationThe remaining pair—the sex chromosomes—carries genes that determine biological sex. In the human inheritance model used here, females have two X chromosomes (XX), while males have one X and one Y chromosome (XY). X and Y name chromosomes, rather than different alleles of a single gene.
Paper 1, Paper 2
A chromosome involved in determining biological sex. In the usual human pattern, females have XX and males have XY.
Revise: Alleles and inheritance patternsOne pair consists of the sex chromosomes.
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