L1 - Cell Division

• Chromosomes are very, very long structures made of DNA and in each normal human body cell, there are 46 chromosomes found in the nucleus.
• DNA is a chemical
• The 46 human chromosomes come in pairs as 23 chromosomes are inherited from your mother and 23 chromosomes are inherited from your father.
• Genes are found in rows on chromosomes and genes come in pairs so you have two copies of each gene.
• 3 bases on the DNA code for one amino acid. The amino acids bond together to form a protein.