Site pages
Current course
Participants
General
Topic 1
Topic 2
Topic 3
Topic 4
Topic 5
Topic 6
Topic 7
Topic 8
Topic 9
Topic 10
Topic 11
Topic 12
Topic 13
Topic 14
Topic 15
Topic 16
Topic 17
Topic 18
Topic 19
Topic 20
Topic 21
Topic 22
Topic 23
Topic 24
Topic 25
Topic 26
Topic 27
Topic 28
Topic 29
Topic 30
Topic 31
1.2.1.1 Evidence that genes are made of DNA (or sometimes RNA)
1.2.1.1 Evidence that genes are made of DNA (or sometimes RNA)
Transformation in Bacteria
Frederick Griffith laid the foundation for the identification of DNA as the gene tic material in 1928 with his experiments on transformation in the bacterium Pnuemococcus, now known as Streptococcus pneumoniae.
DNA: The transforming material
Oswald Avery, Colin Mac Leod, and Maclyn Mc Carty showed the transforming substance to be DNA in 1944 in virulent cells of Streptococcus pneumoniae.
In 1952, A.D. Hershey and Martha Chase performed experiment in T2 bacteriophage . The phage is composed of protein and DNA only. The experiment showed that the genes of phage are made of DNA.
Last modified: Tuesday, 19 June 2012, 5:13 AM