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Mendal Pea Plant Expirements
During the course of the expirement Mendal discovered many new rules about heredity. These rules had to do with dominant and recessive alles, true breeding, and the laws of segragtion and assortmant. -
Frederick Miescher Isolates Nuclein
Frederick Miescher isolated nuclein( now known as nucleic acid). This find helped prove DNA was the true carrier of inherintence. -
Thomas Morgan Fruit fly Genetics
Morgan wanted to understand how a mutation was inherited. So he used fruit flys because the bred quickly and were cheap. -
Influenza outbreak (non DNA)
Influenza is the flu or the common cold. This epidemic infect 500 million people and killed an estimated 20 million. -
Frederick Griffith discovers transformation in bacteria.
Griffth transported different strains of bacteria into mice and saw what happened. Some times the mouse lived ,some times it died. -
Barbara Mclintock
Barbara Mclintock discoveres transposens in corn chromomsomes. this proved that chromosomes were not still but actually moving -
The Japenes attack Pearl Harbor(non DNA)
The Japanese attacked pearl harbor. Over 1,100 americans perished. The next day President Roosevelt issues a declaration of war to congress. -
Oswald Avery and the "transforming factor"
Avery replicated many of Griffiths experiments. He discovered bacteria even had genes. -
Jackie Robinson shatters color barrier (non DNA)
Up until this point African Americans had been banned from professional sports. When Jackie stepped up to bat the color barrier was broken. -
Erwin Chargaff and Chargaff"s Law
Chargaff created a series of laws about DNA. The law states the the ratio of purine bases and pyrimidine bases is 1:1. This is true for both strands of DNA. -
Hershey and Chase prove DNA is the genetic material.
Up until this point it was widely thought proteins were the true carriers of genetic material. This was becasue DNA was viewed as too simple. This discovery changed the entire course of modern biology. -
Rosalind Franklin "Photo 51"
Photo 51 was taken the trough x-ray diffraction. This photo was cruciacl in determining the DNA model. It Proved the shape was a helix. -
Linus Pauling hypotisizes triple helix.
Linus Pauling was probably the most famous biologist at the this time. He proposed the thath the shape of the DNA model was a triple helix. Sadly this was quickly disproven. -
Watson and Crick confirm double helix.
Watson and Crick confirmed double helix was the true DNA model. This was revolutionary in decoding DNA and helping biologists figure out other unsolved mysterys about orginisms. -
Start of Vietnam Conflict (non DNA)
This ten year conflict happened when the U.S decided to help the south vietnamese. In reality the U.S. was trying to fight communism spread by Soviet Russia. -
Johnny Cash Plays live at Folsom Prison (non DNA)
He previously released a hit titled "Folsom Prison Blues". This gave Cash the idea to actually play in the prison which he did.
