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Friedrich Meischer discovered nucleic acid in 1870. He discovered this when he found a substance with unexpected properties that didn't match the ones of proteins. This led to the discovery which he called "nuclein" which is now known as deoxyribose nucleic acid.
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Fredrick Griffith discovered the transformation of bacteria through an experiment on mice. This overall proved his project that DNA is a molecule of inheritance.
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In 1933 Thomas Morgan proved that gene and genetic material is carried in chromosomes through his experiment done on fruit flies.
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Oswald Theodore Avery discovered that the nucleic acid in DNA both stores and transmits material and info to each generation of organisms. He also found that DNA is where genes and genetic information is found.
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Erwin Chargaff discovered what he called Chargaff's Rules which showed that the number of adenine is equal to the number of thymine, while the number of cytosine is equal to the number of quanine in DNA
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Rosalind Franklin made a famous discovery through x-Ray diffraction. The image taken showed and proved the structure of DNA, which is a double helix. Wilkin's discovery was similar to Franklins in discovering the double helix
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The Hershey & Chase experiment proved that DNA is made of genetic material. This corrected the previous assumptions that proteins carried genetic information since DNA and protein are similar, and it was DNA that was the heriditary material.
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Watson & Crick received most of the credit for the discovery of DNA even though it was discovered in the 1860's. But they did put the finishing pieces together from the work of Rosalind Franklin and discovered the DNA stucture of the double helix.
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Theodor Heinrich Boveri studied the mechanisms of heredity and the theory of inheritance. His experiments also helped distinguish the roles of cytoplasm and the nucleus in a process called embryogenesis, which is where adjacent cells communicate with eachother.
