Who is experiment demonstrated that DNA is the molecule of heredity?

Answer 1

The Avery and Hershey-Chase Experiments

• Alfred Hershey and Martha Chase provided the

final experimental evidence that pointed to DNA

as the hereditary material the team studied viruses that infect bacteria

-the structure of these viruses is very simple: a core of

DNA surrounded by a coat of protein

-the viruses attach themselves to the surface of

bacteria cells and inject their genes into the interior

• the infected bacterial cell is then forced to make hundreds of

copies of new viruses, which then burst out of the cell to

infect new cells.

• Hershey and Chase used radioactive

isotopes to "label" or tag the DNA and the

protein of the viruses

-some viruses were grown so that their DNA

contained radioactive phosporous (32P)

-other viruses were grown so that their protein

coats contained radioactive sulfur (35S)

After the labeled viruses

were allowed to infect

bacteria, only the viruses

with 32 P had labeled

tracer in their interior

• The conclusion was that

the genes that viruses

use to specify new

viruses are made of DNA

and not protein

Answer 2

Frederick Griffith identified it first but it was not named DNA until after his death. Oswald Theodore Avery, Colin MacLoed and Maclyn McCarty did. See the related link for more information.

Answer 3

fredrick griffith

Answer 4

of course!!!

Answer 5

I believe Oswald Avery