-
Mendel
Experiment: grow pea plants and crossed bred them. He took one yellow pea and one green pea and bred them together to see what their off spring would look like. Their off spring was yellow. Than he bred tall pea plants with shorter pea plants and their off spring was tall. He also bred peas with colored coats and non color coats and peas that were winkeled and peas that weren't -
Mendel
Experiment Conclusion: Medel discovered three rules of heritance
1) the law of Segregation
2) the law of indetpendant Assortment
3) The Law of Domonace.
Importance to the discovery f DNA: he discovered that domanite genes are the genes that over rule the less domanite gene. -
Griffith
Experiment- worked with two different strains of bacteria. Rough strain (R-strain) and the Smooth strain (S-strain). He used mice and ejected both strains into them to see what happens to the mice. The R-strain wouldn’t kill the animal, where as the the S-strain killed the mouse. Griffith than heated up the S-strain and ejected it into another mouse the mouse lived! -
Griffith
Picture of Griffith's Experiment Experiment (Cont): mouse the mouse lived! He ejected the heat killed S-strain and the R strain into a mouse and the mouse died. -
Griffith
significance to the discovery of DNA: Transformation is when a genetic change occurs and bacteria takes up a foreign material- DNA. -
Avery, MacLeod, and McCarty
Conclusion: DNA holds the genetic information. Significance to the discovery of DNA: they discovered that the genetic information was stored in the DNA. -
Avery,MacLeod, and McCarty
Experiment Picture Experiment: Much like Griffith’s experiment these guys worked with mice. First they ejected heat killed S-strain, R-strain, and an enzyme that broke down proteins. The mouse died. Than they tried again but this time they ejected the heat killed S-Stain, R-Strain, and an enzyme that brakes down DNA, the mouse lived. -
Chargaff
Conclusion: He discovered that A always bonds with T and C always bonds with G A,T,C,G are the four nitrogen bases in DNA . Significance to the discovery of DNA: discovered how the nitrogen bases are bonded.... A-T C-G -
Franklin and Wilkins
Experiment Significance to the discovery of DNA: Wilkins discovered that the structor of DNA was the double helix. -
Hershey and Chase
Experiment: Worked with the T2 bacteriophage. The T2 would attach itself to bacteria, eject something into them and trick them into making more of the T2. They died the protein coat around the T2 with a radioactive chemical that would glow. Once the T2 landed on the bacteria and ejected the stuff into it... nothing glowed. They than did the same thing for DNA and it glowed. -
Hershey and Chase
Experiment Conclusion: Discovered that DNA was the genetic material.
Significance to the discovery of DNA: Confirmed that DNA was the genetic material. -
Franklin and Wilkins
Experiment: took pictures of the DNA molecule using a process called x-ray defraction.
Conclusion: Conclusion: Franklin took a picture of the DNA and Watson and Crick ended up using that picture to make a model of DNA. -
Watson and Crick
Experiment Experiment: Made the model of DNA
Conclusion: DNA is a double Helix and it is the genetic material.
Importances to the discovery of DNA: Determand that DNA was a double helix and it was the gentic material.
