Sex determination

Biology (Combined Science) · GCSE · AQA · AQA GCSE Combined Science: Trilogy (8464) — Biology — Higher · Specification point · 4.6.1.6 · Inheritance, variation and evolution · Reproduction

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4.6.1.6 Sex determination

Content	Key opportunities for skills development
$Ordinary human body cells contain 23 pairs of chromosomes. 22 pairs control characteristics only, but one of the pairs carries the genes that determine sex. In females the sex chromosomes are the same (XX). In males the chromosomes are different (XY).$
$Students should to be able to carry out a genetic cross to show sex inheritance. Students should understand and use direct proportion and simple ratios in genetic crosses.$	$MS 1c, 3a$

Sex determination (4.6.1.6) | AQA GCSE Combined Science: Trilogy (8464) — Biology — Higher | KnowledgeSet