By doing experiments with garden peas, Mendel led to the discovery of basic genetics.
By studying how fruit flies mated and what the offspring looked like, Morgan concluded that there are sex linked traits.
Avery discovered, with the help of this colleagues, that DNA was the transforming agent in Fredrick Griffiths' experiment.
While trying to discover a cure for pneumonia, Griffith stumbled upon a process of heredity called transformation.
She contributed to Watson and Crick's experiment by taking X-ray diffraction photos of DNA.
Both of these brilliant scientists figured out the structure of DNA.
With the help of Martha Chase, tested whether DNA or protein was transfered by bacteriophages. DNA was transfered.
Japan, Germany, China and many other countries contributed to the United States' Human Genome Project so that they could identify all 20,000 genes in DNA.