Chromosomes

• DNA


  A chemical which carries the genetic information of a living cell
• Gene


  A section of DNA which has the code for a protein that controls a characteristic
• Chromosome


  • A thin strand, single molecule of DNA found in the nucleus of eukaryotic cells
  • It contains lots of genes
• Chromosomes in females


  • xx
• Chromosomes in males


  • xy
• How many chromosomes in a red blood cell

  0
• how many pairs of chromosomes in a nucleus

  23
• how many chromosomes in an egg cell

  Half