A brief history of genetics.

1850 1900 1950 2000 1865 Genes are particulate factors 1871 Discovery of nucleic acids 1903 Chromosomes are hereditary units 1910 Genes lie on chromosomes 1913 Chromosomes are linear arrays of genes 1927 Mutations are physical changes in genes 1931 Recombination occurs by crossing over 1944 DNA is the genetic material 1945 A gene codes for protein 1951 First protein sequence 1953 DNA is a double helix 1958 DNA replicates semiconservatively 1961 Genetic code is triplet 1977 Eukaryotic genes are interrupted 1977 DNA can be sequenced 1995 Bacterial genomes sequenced 2001 Human genome sequenced 2008 First synthetic genome