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GCSE Biology · key term
The classification of an individual as biologically male or female in the simplified GCSE model, based on inherited sex chromosomes and the resulting development of reproductive structures.
Used by OCR
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Sex DeterminationThe four boxes are possible combinations, not four actual children: a family is not guaranteed to have equal numbers of each biological sex.
Each fertilisation is an independent event. The biological sex of earlier children does not alter the probability for the next child.
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