-
Fredric Griffith Contribution
In 1928 a scientist named Frederick Griffith was
working on a project that enabled others to point out that DNA was the
molecule of inheritance. -
Period: to
Dna Contribution stories
-
Erwin Chargaff
To understand the DNA molecule better scientists were trying to
make a model to understand how it works and what it does. In the
1940’s another scientist named Erwin Chargaff noticed a pattern in the
amounts of the four bases: adenine, guanine, cytosine, and thymine. thus making chargaffs rules -
Oswald averys contribution
when all DNA was eliminated the bacteria stopped
transforming. This discovery identifying DNA as the active agent in
transformation was the “transforming principle.” -
Alfred hershey and Martha Chase Contribution
1952 Alfred Hershey and Martha Chase suggest that
only DNA is needed for viral replication. Using radioactive isotopes
35S to track protein and 32P to track DNA -
Rosalind Franklin and Maurice Wilkins
Two scientists named, Rosalind Franklin and Maurice
Wilkins, wanted to try to make a crystal of the DNA molecule. If
they could get DNA to crystallize, then they could make an x-ray
pattern, then making it easier to understand how DNA works. -
Cricks and watsons contributions
In 1953 two scientists, James Watson and Francis
Crick, were trying to put together a model of DNA. When they saw
Franklin and Wilkin's picture of the X-ray they had enough information
to make an accurate model. making the first correct modle of DNA
