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Charles Darwin discovers natural selection
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Gegor Mendel creates the punnet square and adds to the knowledge of modern genetics.
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Thomas Hunt Morgan and his students study fruit fly chromosomes. They find that chromosomes carry genes.
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Oswald Avery, Colin MacLeod, and Maclyn McCarty show that DNA transforms the properties of cells, not proteins. This clarified the chemical nature of genes.
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Test show that only the DNA of a virus needs to enter a bacterium to infect it, implying that genes are made of DNA.
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Francis Crick and James Watson create a model of DNA. Showing that it is a double helix structure.
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Joe Hin Tijo defines 46 as the exact number of chromosomes in human cells.
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Scientists create the first genetically modified living mice and fruit flies.
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Scientists find a method to posistionally clone a disease gene.
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The finished human genome sequence will be at least 99.99% accurate
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