1950 In DNA, there are equal amounts
of A and T, and equal amounts of C and G. However, the A+T to C+G ratio can
differ between organisms.
1952 DNA is the molecule that mediates
heredity, these results really convinced everyone.
1953 DNA is in the shape of a double
DNA replication is semi-conservative.
1966 The genetic code is cracked by a
number of researchers.
1970 The first restriction enzyme is
DNA is first constructed.
1977 DNA sequencing technology is
1990's Genome projects are begun.
1990's DNA microarrays are invented.
1990's DNA fingerprinting, gene
therapy, and genetically modified foods come onto the scene.
1995 Automated sequencing technology
allows genome projects to accelerate.
1996-7 The first cloning of a mammal
(Dolly the sheep) is performed.
2000 The Drosophila genome is
completed. The Arabidopsis genome is completed. The human genome is
reported to be completed.
2001 The sequence of the human genome
is released, and the "post-genomic era" officially begins.
2007 Controversies continue over human
and animal cloning, research on stem cells, and genetic modification of crops.
In 1997 DNA testing became available to
people for Genealogy purposes. You can find your ancestral origins, ethnicity,
living relatives, missing relatives, and much more.
Timeline - back to Why is DNA so important ?