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DNA: Deoxyribose Nucleic Acid The Genetic Material.

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Presentation on theme: "DNA: Deoxyribose Nucleic Acid The Genetic Material."— Presentation transcript:

1 DNA: Deoxyribose Nucleic Acid The Genetic Material

2 DNA Deoxyribose nucleic acid  type of nucleic acid –What is the other type of nucleic acid? RNA DNA function –to hold genetic code –Genetic code = genetic instructions to make proteins DNA is found in nucleus of eukaryotic cells

3 The Short History of DNA and Genetics (Part 1) From

4 Searching for Genetic Material Gregor Mendel (1866): –discovered that inherited traits are determined by discrete units, or 'genes,’ - passed on from the parents. Freidrich Miescher(1868): –discovered DNA –Isolated something new from the nuclei of eukaryotic cells Later called DNA!!!

5 Searching for Genetic Material Thomas Hunt Morgan (1910): –Worked with fruit flies Specifically eye color of these flies! –Discovered genes are located (linked) on chromosomes

6 Discovering the structure of DNA Rosalind Franklin (1952) Obtained sharp X-ray diffraction photographs of DNA (Photo 51) Watson and Crick used her data  revealed its helical shape Watson and Crick went on to win Nobel Prize (1962) for their DNA model Photo 51

7 How did PHOTO 51 reveal DNA’s helical shape?

8 X-rays passing through a helix diffract at angles perpendicular to helix making an "X" pattern, which favors an equal diameter "helix".

9 She finally gets credit Rosalind Franklin University of Medicine and Science, located on Green Bay Road in North Chicago, Illinois

10 Discovering the structure of DNA James Watson & Francis Crick (1953) Discovered double helix structure Solved the three-dimensional structure of the DNA molecule Watson Constructing Bair Pairs movie


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