Question

Describe Griffith’s experiment for demonstration of DNA as a genetic material with suitable diagram

27 Jan 2024
Answer :
Word Count : 498

Griffith's experiment, conducted in 1928 by Frederick Griffith, was a pivotal experiment in the field of genetics that provided strong evidence suggesting that DNA is the genetic material responsible for transmitting hereditary traits. Here's a description of the experiment along with a simplified diagram:

Experiment Description:

  1. Preparation of Bacterial Strains: Griffith worked with two strains of the bacterium Streptococcus pneumoniae. One was a virulent (disease-causing) strain called the S strain, which had a smooth appearance due to a polysaccharide capsule that protected it from the host's immune system. The other was a non-virulent (harmless) strain called the R strain, which lacked the capsule and had a rough appearance.

  2. Experimental Procedure:

    a. Griffith injected mice with four different combinations of bacterial ________ _______ __________ __________ ______ ____ ________.
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