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DNA, Chromosomes & Genes

DNA, Chromosomes & Genes. What is DNA?. The molecule that contains the genetic code It coils up tightly inside chromosomes. What is a GENE?. A code carried on the DNA molecule. Each DNA molecule contains many genes

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DNA, Chromosomes & Genes

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  1. DNA, Chromosomes & Genes

  2. What is DNA? • The molecule that contains the genetic code • It coils up tightly inside chromosomes

  3. What is a GENE? • A code carried on the DNA molecule. • Each DNA molecule contains many genes • Carries the information for the physical and functional characteristics of an individual

  4. What is a GENE? • Each chromosome carries a couple of thousand genes • Many of these are common to all human beings. • So, 99.9% of your DNA is identical to everyone else's

  5. What is a GENE? • The remaining 0.1% influences the differences between us • height, hair color and susceptibility to a particular disease, etc. • Environmental factors, such as lifestyle (for example, smoking and nutrition) also influence the way we look and our susceptibility to disease

  6. GENOME The nucleus of a human cell contains between 30 000 and 40 000 genes. This complete set of genes is called theGENOME.

  7. The structure of the genome: • Tightly coiled threads of DNA and protein molecules • Organized into structures called chromosomes

  8. What are CHROMOSOMES? • A packet of coiled up DNA • They are in the nucleus of cells

  9. What are CHROMOSOMES? • Each chromosome has a single strand of DNA which carries the code for a couple of thousand genes

  10. http://ghr.nlm.nih.gov/info=basics/show/gene

  11. Assignment: Create a visual representation of the following: • A cell nucleus • A set of chromosomes within the nucleus • A clear portion of the DNA molecule found within the chromosome • A gene or group of genes found within the DNA molecule

  12. http://www.youtube.com/watch?v=C8OL1MTbGpU

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