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Experiment-Morgan bred white eyed mutant flies and found that in one generation of flies, the trait was only in males.

Contributions- Established that genes are located on chromosomes

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Experiment- Injected mice with different strains of bacteria: rough(safe), smooth (deadly) but found when heat killed smooth strain was mixed with the rough strain, the mouse still died
Contributions- Reported the first widely accepted variations of bacterial transformation

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Experiment-They took the Live R and heat-treated S and mixed it with protease( protein destroyer) and *DNase ( destroys DNA)

Contribution- determined the cause of the transformation in Griffith's experiment

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Experiment-
Used paper Chromatography and UV spectroscopy to examine abundance of nucleobases
Contributions- Established Chargaff's rules ( Adenine has the same amount as thymine and guanine has the same amount as cytosine)

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Experiment- The Hershey–Chase experiments were a series of experiments conducted in 1952 by Alfred Hershey and Martha Chase that helped to confirm that DNA is genetic material

Contributions- Hershey and Chase and subsequent discoveries all served to prove that DNA is the hereditary material.

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Experiments-
Used X rays to photograph DNA
Contributions- Photographed the double helix structure of the DNA

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Experiments- Created the model of DNA based on Rosalind's photograph

Contributions
Built the first DNA molecule

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Experiments- They grew E. coli in a medium containing heavy nitrogen (N-15).  They then added the E. coli to a medium containing regular nitrogen (N-14) and observed it over several generations.

Contributions- Discovered that DNA was semi-conservative