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Do Now

Do Now. How much DNA do you share with these living things? Please write answers as a %. http://www.thetech.org/genetics/common.php. The Structure of DNA. Rosalind Franklin. Used X-rays to visualize the structure of DNA, 1953 Died in 1958, of cancer possibly linked to X-ray exposure.

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Do Now

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  1. Do Now • How much DNA do you share with these living things? Please write answers as a %

  2. http://www.thetech.org/genetics/common.php

  3. The Structure of DNA

  4. Rosalind Franklin • Used X-rays to visualize the structure of DNA, 1953 • Died in 1958, of cancer possibly linked to X-ray exposure

  5. Maurice Wilkens • Colleague of Rosalind Franklin’s, working on X-ray diffraction. • Won Nobel Prize with Watson and Crick.

  6. James Watson and Francis Crick • Determined shape using modeling and data from X-ray Diffraction

  7. Nucleus ANIMAL CELL PLANT CELL

  8. NUCLEOTIDE NITROGEN BASE SUGAR PHOSPHATE GROUP

  9. Phosphate Group O O=P-O O 5 CH2 O N Nitrogenous base (A, G, C, or T) C1 C4 Sugar (deoxyribose) C3 C2 DNA Nucleotide

  10. BMSS LIFE SCIENCES WORKSHOP • Four Types of Nitrogen Bases: • Adenine (denoted by “A”) • Thymine (denoted by “T”) • Cytosine (denoted by “C”) • Guanine (denoted by “G”)

  11. Purines Pyrimidines

  12. DNA strands run in opposite directions to each other and are therefore anti-parallel. 5’ 3’ 5’

  13. DEOXYRIBONUCLEIC ACID (DNA)

  14. Components of Human Cell

  15. THE DOUBLE HELIX

  16. 23 pairs of Chromosomes in a human cell = 22 pairs autosomal, 1 pair sex chromosomes

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