Sex Determination
Contents
Key Stage 4
Meaning
Sex determination is how the sex of a individual is decided by the chromosomes.
About Sex Determination
- In humans; females have two X Chromosomes while males have an X Chromosome and a Y Chromosome.
- The probability of a male or a female being conceived is 50%.
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| This punnett square shows the chances of having male or female offspring. |
References
AQA
- Sex determination, page 211, GCSE Biology; Third Edition, Oxford University Press, AQA
- Sex determination, pages 192-3, GCSE Biology, Hodder, AQA
- Sex determination, pages 40-1, GCSE Combined Science Trilogy 2, Hodder, AQA
Edexcel
- Sex determination, page 39, GCSE Biology; The Revision Guide, CGP, Edexcel
- Sex determination, pages 111, 112, GCSE Biology, CGP, Edexcel
- Sex determination, pages 29, GCSE Combined Science; The Revision Guide, CGP, Edexcel