Sex determination in humans — AQA GCSE Combined Science Synergy
Teaching note based on the AQA specification.
Test yourself on Sex determination in humans with AQA GCSE practice questions.
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- In human cells, one of the 23 pairs of chromosomes carries the genes that determine sex. In females the sex chromosomes are the same (XX); in males the chromosomes are different (XY). All eggs contain an X chromosome. Sperm cells contain either an X or a Y chromosome.