DNA

• Gene codes for a specific protein
• Every organism has a genome
• Only one gene codes for one protein, but they make up thousands of different proteins
• Understanding the human genome is important for science and medicine
• Scientists can trace the migration of populations using genes
• The human genome is mostly identical in all individuals, but differences have developed as populations migrated
• Chromosomes are really long molecules of DNA
• Scientists have worked out the complete human genome
• Knowing which genes are linked to inherited diseases could help understand and develop treatments for them
• Chromosomes are long structures called chromosomes
• By investigating genetic differences, scientists can determine when new populations split off and their migration routes
• A DNA molecule forms a double helix structure
• All modern humans are descended from a common ancestor who lived in Africa