Sex determination

• How many pairs of chromosomes do ordinary human body cells contain?

  23 pairs
• What do 22 pairs of chromosomes control?

  Characteristics only
• What is the function of the one pair of chromosomes in humans?

  Determines sex
• What are the sex chromosomes in females?

  XX
• What are the sex chromosomes in males?

  XY
• What are the differences between male and female sex chromosomes?

  • Females have XX chromosomes
  • Males have XY chromosomes