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Friedrich Meischer
Friedrich Meischer isolated DNA with associated proteins from cell nuclei. He was the first person to identify DNA as a distinct molecule In his experiments he used salmon sperm and infection pus. He believed that proteins were molecules of heredity. -
Frederick Griffith
Frederick Griffith discovered that bacteria can distinctively change their function and their form through transformation. In his tests he used mice. He wasn't trying to find genetic material, but instead, he was trying to find a vaccine for pneumonia. -
Oswald Avery, Maclyn McCarty, and Colin MacLeod
Oswald Avery, Maclyn McCarty, and Colin MacLeod showed that DNA can transform the properties of cells, clarifying the chemical nature of genes. Through their experiments, they tested on mice and streptococci bacteria. They were interested in finding the other strain of DNA. -
Barbra McClintock
Barbra Discovered how corn are different colors. She also discovered that genes are not always on the same spot on a chromosome. She accomplished all this while she got along poorly which her family -
Erwin Chargaff
Erwin Chargaff discovered that the number of Guanine units is equal to the number of Cytosine units, and also that the number of Adenine units is equal to the number of Thymine units. He paved the path for the discoveries of DNA's structure and its method of replication. He used test tubes to help him during his experiments. -
Alfred Hershey and Martha Chase
Alfred Hershey and Marta Chase discovered that phage DNA is genetic material. They used bacteria to conduct their experiments during their research. They showed that DNA is the carrier of the genetic information. -
Linus Pauling
Linus Pauling researched the nature of the chemical bond and its application to the elucidation of the structure of complex substances. During his experiments, Pauling tested proteins during his research. He helped discover the spiral structure of proteins. -
James Watson & Frances Crick
James Watson and Frances Crick discovered that the structure of DNA was a double helix. Now they did not share their discovery by any normal means. They walked into a pub down the street and said the had found the answer to life. -
Rosalind Franklin and Maurice Wilkins
Maurice Wilkins and Rosalind Franklin found out that genes are encoded in the sequence of bases. Rosalind used X-Ray diffraction to create a 3D model of DNA. they also supported the double helix model. Viruses were used to help them conduct their experiments during research. -
Matthew Meselson & Franklin Stahl
Matthew and Franklin performed a experiment that proved Watson and Cricks double helix theory. their method was density-gradient centrifugation. Their experiment also showed how DNA could be replicated. -
Frederick Sanger
Frederick Sanger discovered how to sequence DNA. Even though this is the 1950s he was offered Knighthood. He rejected this because he did not like being called Sir -
Paul Berg
Paul Berg developed a way two split DNA. Further proving the double helix model that Watson and Crick came up with.He also graduated from Penn State -
Kary Mullis
Kary invented a process known as Polymerase Chain Reaction (PCR). This showed how DNA could be copied largely. While doing it in a small period of time. -
J. Craig Venter
Craig created the first draft of sequenced human genome. He is also the founder of Human Longevity. he also tested a synthetic genome.
