X and Y chromosomes

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  • X and Y chromosomes
    • Your chromosomes control whether you're a male or female
      • 1) There are 23 pairs of chromosomes in every human body cell
      • 2) The 23rd pair are labelled XX or XY
      • 3) There are two chromosomes that decide whether you turn out male or female:
        • All men have an X and a Y chromosome: XY The Y chromosome causes male characteristics
        • All women have two X chromosomes XX: Having two Xs female characteristics to develop
      • 4) sperm cells have an X or a Y chromosome
      • 5) All egg cells have one X chromosome

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