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Friedrick Miescher
Miescher was the first person to discover DNA, back than it was known as "nuclein". His plan was to Characterize the proteins that were found in the white blood cells.During the process, he came across a substance that has chemicals no body yet discovered and soon discovered a new substance. -
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Thomas Edison
The lightbulb was discovered in 1879 by Thomas Edison, he experimented with thousands of different filaments to find the correct things he needed. Later In 1879, he discovered that a carbon filament in an oxygen-free bulb made light but didn’t stay on for a long time so he had to keep expiermenting. Edison also had a bunch of other inventions before and after the light bulb. That’s is why he is really important to us. -
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Alexander Graham
In 1881, Alexander Graham invented the first metal detector, Metal detectors contain one or more inductor coils, which are used to dedicate weather or not there is something metal going past the detector. During his work he came along some encounters but he never gave up, he worked passed those encounters and soon invented the medal detector -
Frederick Griffith
In 1928 Griffith discovered the "transforming principle", this was the first experiment to say bacteria was capable of transferring genetic information. This process is called transformation. In order for him to discover this Griffith had to use two strains of pneumococcus. "He used a type III-S (smooth) and type II-R (rough) strain." -
Oswald Avery
Avery discovered that DNA carries genetic material and can be altered through transformation. His experiments showed that DNA is the transforming principle, but he didn't try to figure out how transformation works. He discovered it along the way with a different discovery. Along the way he found out that "transformation principle was unaffected by treatment with protein enzymes and was destroyed by a DNA-digesting enzyme." -
Rosalind Franklin and Maurice Wilkins
Franklin was desperate to discover the molecular structure of DNA, in 1945 she worked as a research associate for John Randall at King’s College in London. She took X-ray diffraction photographs of DNA that showed a form of the molecule. Rosalind is best known for her work on the X-ray diffraction images of DNA ,which led herself and Wilkins to the discovery of the DNA double helix. -
Erwin Chargaff
Chargaff was a hard working student in college when he herd about Avery and his discovery's, so he dropped everything and started discovering more DNA history. He had two main rules, his rules were named Chargaff rules. They stated that DNA from any cell should have a 1:1 ratio and that the amount of guanine is equal to the amount of cytosine and adenine w thymine. -
Hershey and Chase
• Hershey and chase discovered the genetic material found in DNA. They injected chemical tracers that reassembled proteins and DNA into a virus called T2. They worked together and found available that DNA was assassinated genetic materiel so it could be transferred. -
Watson and Crick
• Watson and Crick discovered the double helix known as DNA structure. To do this they used a lot of experiments when they realized they had to use the discovery that Franklin made, x-ray diffraction. So they used x-ray photographs and discovered the structure.
