Reason For Learning
Within the nucleus of almost every one of your cells, 46 DNA molecules or chromosomes contain approximately 20000 to 25000 genes that act as a blueprint directing which proteins are to be synthesised by the cell. By controlling cell functioning, DNA is able to determine the characteristics of the entire person-your eye colour, build, skin type, and susceptibility to some diseases. DNA is unique among molecules because it's structure allows it to manufacture another molecule, identical to itself, and in doing so transmit it's genetic code from parents to their children.
Learning Intention
After completing this learning bite you should be able to:
Identify the phosphate, deoxyribose and base groups that combine to form DNA.
Describe the nature and bonds in DNA, you should also be able to explain the pairing of the bases.
Describe the primary, secondary and tertiary structure of DNA.
Explain the basic principles of DNA profiling and its application to forensic analysis.
Recall the principles of electrophoresis.
Key Vocabulary Terms