development of knoweledge of DNA

By Murray1011

  • Gregor Mendel

    Gregor Mendel (a monk) was responsible for the discovery that certain traits of a plant, pea plants in particular, could be passed on through the off spring. He did this by cross pollinating yellow round pea plants and wrinkly green pea plants, this resulted in him observing that the yellow pea plants dominated the off spring at roughly a 3:1 ratio

  • Friedrich Miescher

    Friedrich Miescher was responsible for the discovery of DNA. Being the first to discover DNA, he did so by accident. the discovery was made when he was executing an experiment, he was analysing cells and found a substance that had different properties than proteins. He then called this substance "Nuclein".

  • Boveri-Sutton

    These two scientists at very similar times developed independently from each other, works that would later be attributed to the creation of the chromosome theory of inheritance. Sutton worked on grasshoppers and showed that chromosomes occur in matched pairs of maternal and paternal chromosomes which separate during meiosis while Boveri studied sea urchins, in which he found that all the chromosomes had to be present for proper embryonic development to take place.

  • Thomas Morgan

    Through expirmentation, Thomas Morgan discovered what are now known as sex-linked genes and the behavior and localization of genes.

  • Phoebus Levene

    Phoebus Levene discovered that the sugar deoxyribose is present in nucleic acids and later proved that DNA is made up of nucleotides, which consist of a deoxyribose sugar, a phosphate group and one of the four bases.

  • Erwin Chargaff

    Erwin Chargaff was the scientist who discovered the pattern that occurred in the four bases Adenine, Guanine, Cytosine and Thymine. A=T and G=C

  • Maurice Wilkins and Rosalind Franklin

    Rosalind Franklin and Maurice Wilkins worked on DNA with x-rays observing the diffraction. Their work led to the discovery of the DNA double helix

  • Watson & Crick

    Responsible for the discovery of the double helix spiral shape of DNA by using the work of Rosaland Frankland with x-ray diffraction