Chapter 9

Chapter 9 - Chapter 9-DNA: The Molecule of Heredity I. How...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 9—DNA:  The Molecule of Heredity I. How did scientists discover that genes are made of DNA? a. Introduction i. DNA is the molecule that carries the blueprints for all forms of life on  Earth 1. The “molecular interactions” in DNA direct the life of each cell in  an organism 2. Also enables organisms to transmit info accurately from one  generation to the next ii. Discovery of how DNA works was one of the greatest achievements of  20 th  century biology b. Transformed bacteria revealed the link between genes and DNA i. Frederick Griffith did experiments with 2 strains of  Streptococcus  pneumonia  bacterium in mice 1. Although he never found a vaccine, his experiments marked a  turning point in understanding of genetics because other  researchers suspected that the substance that causes  transformation might be the long-sought molecule of heredity ii. Oswald Avery, Colin MacLeod, and Maclyn McCarty of Rockefeller  University purified the molecule from the S-strain bacteria that could  transform the R-strain into the S-strain 1. This was DNA 
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

Chapter 9 - Chapter 9-DNA: The Molecule of Heredity I. How...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online