Transcription: So in about 1900 we had the results of Gregor Mendel's P experiments and Darwin's theories of evolution. We knew that hereditary information was passed on from parent to offspring, but we didn't know how. The hunt was on. Some scientists thought that the gene information was stored in proteins. Others thought that our genes were made of DNA or deoxyribonucleic acid, which is a chemical substance found in the nucleus of every cell of every living organism, but the chemists couldn't work out the structure for it all. Then in 1953, James Watson and Francis Crick finally discovered this chemical s ...
(.mp3)