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DNA Notes

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Brief history and description of the discovery of DNA structure.

Brief history and description of the discovery of DNA structure.

Published in: Technology

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Transcript

  • 1. DNA Presented by Mrs. Sanford 7th Life Science Barber Middle School
  • 2. DNA (Deoxyribonucleic Acid)
    • chemical code
    • master copy of instructions for cell structure and function
    • agenda
    • blueprints
    • owner’s manual
  • 3. DNA (Deoxyribonucleic Acid)
    • chemical code
    • gives you your characteristics
    • traits like hair color, eye color, height, personality, talents
  • 4. DNA (Deoxyribonucleic Acid)
    • chemical code
    • organic compound
    • contains carbon
    • nucleic acid
  • 5. DNA (Deoxyribonucleic Acid)
    • structure (what it looks like)
    • three dimensional helix
    • spiral staircase
    • twisted ladder
  • 6. DNA (Deoxyribonucleic Acid)
    • structure
    • sides or “handrails” are made of sugars and phosphates
    • ‘ ribo’ is for ribose, a sugar
  • 7. DNA (Deoxyribonucleic Acid)
    • structure
    • cross pieces, “rungs” or “steps” are made of nitrogen base pairs
    • Same two bases always pair
    • adenine, thymine (A, T)
    • cytosine, guanine (C, G)
  • 8. DNA (Deoxyribonucleic Acid)
    • discovery/history
    • 1950’s
    • x-rayed by Rosalind Franklin
    DNA X-ray Rosalind Franklin
  • 9. DNA (Deoxyribonucleic Acid)
    • discovery/history
    • 1950’s -1960’s
    • Maurice Wilkins gives Franklin’s x-rays to Watson and Crick
    • Francis Crick and James Watson make a model of DNA
  • 10. DNA (Deoxyribonucleic Acid)
    • discovery/history
    • 1960’s
    • Franklin dies of cancer
    • Wilkins, Watson, and Crick share a Nobel Prize for the model
  • 11. DNA (Deoxyribonucleic Acid) Wilkins Watson and Crick DNA Model DNA Model Sketch
  • 12. DNA (Deoxyribonucleic Acid)
    • DNA replication
    • happens in interphase
    • Watson and Crick also modeled this
  • 13. DNA (Deoxyribonucleic Acid)
    • DNA replication
    • enzymes break apart the bases
    • RNA collects extra bases from the cytoplasm
  • 14. DNA (Deoxyribonucleic Acid)
    • DNA replication
    • the extra bases pair with the broken DNA strands
    • new handrails form from sugars and phosphates
  • 15. DNA (Deoxyribonucleic Acid)
    • DNA replication
    • Two new strands have been created
  • 16. DNA (Deoxyribonucleic Acid)
    • Mutation
    • Damaged chromosomes
    • Mismatched base pairs
  • 17. DNA (Deoxyribonucleic Acid)
    • Mutation
    • - Mistakes in the DNA
    • Example: albinism

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