The origins of DNA were first discovered in 1857 by Gregor Mendel, the "Father of Genetics", who was carrying out a genetics experiment with plants of pea and would provide a basic foundation for DNA and genetics. Friedrich Miescher and Richard Altmann in 1869 were also among the first to discover DNA. While testing salmon sperm, they discovered a strange substance they would call "nuclein", known as DNA. We would discover that “nuclein” (DNA) only exists in chromosomes. Frederick Griffith, a researcher, discovered the basis of DNA from a molecule delivery experiment involving mice and two types of pneumonia. heated (to kill) and injected into a mouse, the mouse survives. Unlike the second mouse that was injected with a non-virulent disease, the virulent disease (which had been heated and killed) is killed. molecule inheritance (transformation) from virulent bacteria transmitting a characteristic to non-virulent bacteria. The DNA results will continue to be tested and will attempt to better understand how DNA works. Deoxyribonucleic acid (DNA) is a chromosome found in the nucleus of a cell, which is a double-stranded helix (similar to a twisted ladder). DNA is made up of four bases called adenine (A), thymine (T), guanine (G), and cytosine (C), which are always based in pairs of A with T and G with C. The four bases of A, C, G, and T were discovered by Phoebus Levene in 1929, who linked them to the chain of nucleotide units via phosphate-sugar-base groups. As mentioned in Ananya Mandal's research paper, Levene believed that the chain connection with the bases is repeated in a fixed order which constitutes the DNA molecule...... middle of paper...... stody. " TheFreeDictionary.com. Np, nd Web. December 10, 2013. .Wikipedia Contributors, .Norrgard, Karen. December 2013. Wittmeyer, Jacqui. “CAN DNA DEMAND A VERDICT?” Can DNA Demand a verdict?, nd Web, December 8, 2013. “Forensic DNA Analysis.” West Virginia, nd Web December 10, 2013. “Learn: DNA Profiling” Unit 3 Trace Evidence, Lesson 7 of SCI030: Course. forensic science