Concept explainers
Videos
What results from the experiments of Frederick Griffith provided the strongest support for his conclusion that a transformation factor is responsible for heredity?
To analyze:
Study the results of the Frederick Griffith experiment to analyze the conclusion that the transformation factor is responsible for heredity.
Introduction:
In
Explanation of Solution
In
In the first experiment, Griffith tried injecting mice with s strain and the mice died. Secondly, the mice were injected with heat-killed S strain of streptococcus, but surprisingly no death of mice was found. In the third experiment, the mice were injected with R strain, but no death occurred. Finally, when the heat-killed R strain of streptococcus was combined with harmless heat-killed S strain of streptococcus, he found that the mice are dead and the blood samples of the mice contain living S bacteria.
The transformation of R strain to s strain in mice supports the conclusion that Frederick, the transformation factor, causes the heredity.
From Frederick Griffith’s experiment, it is concluded that the transformation factor is responsible for heredity.
Want to see more full solutions like this?
Chapter 7 Solutions
Genetic Analysis: An Integrated Approach (3rd Edition)
- what conclusion can you draw about the order of the M, S, and F genes on the bacterial chromosome?arrow_forwardWhich step of the Central Dogma is responsible for transmission of genetic information from generation to generation? Explain.arrow_forwardWhat is the importance of Gregor Mendel’s Law of Inheritance in Molecular Biology?arrow_forward
- Ron is colorblind which is an X linked recessive condition. He may have gotten this condition from which people? Check ALL that apply 0 Ob) His Father a) His Mother c) His Mother's Father d) His Father's Father O e) His Mother's Mother 1) His Father's Motherarrow_forwardWhat do you mean by “Central Dogma of Molecular genetics?”arrow_forwardDescribe the experiments that proved DNA to be themolecule at the basis of heredity.arrow_forward
- Price et al. [(1999). J. Bacteriol. 181:2358–2362] conducteda genetic study of the toxin transport protein (PA) of Bacillusanthracis, the bacterium that causes anthrax in humans. Withinthe 2294-nucleotide gene in 26 strains they identified five pointmutations—two missense and three synonyms—among differentisolates. Necropsy samples from an anthrax outbreak in 1979revealed a novel missense mutation and five unique nucleotidechanges among ten victims. The authors concluded that thesedata indicate little or no horizontal transfer between differentB. anthracis strains. Question: On what basis did the authors conclude that evidence ofhorizontal transfer is absent from their data?arrow_forwardPrice et al. [(1999). J. Bacteriol. 181:2358–2362] conducteda genetic study of the toxin transport protein (PA) of Bacillusanthracis, the bacterium that causes anthrax in humans. Withinthe 2294-nucleotide gene in 26 strains they identified five pointmutations—two missense and three synonyms—among differentisolates. Necropsy samples from an anthrax outbreak in 1979revealed a novel missense mutation and five unique nucleotidechanges among ten victims. The authors concluded that thesedata indicate little or no horizontal transfer between differentB. anthracis strains. Question: What is meant by ”horizontal transfer”?arrow_forwardPrice et al. [(1999). J. Bacteriol. 181:2358–2362] conducteda genetic study of the toxin transport protein (PA) of Bacillusanthracis, the bacterium that causes anthrax in humans. Withinthe 2294-nucleotide gene in 26 strains they identified five pointmutations—two missense and three synonyms—among differentisolates. Necropsy samples from an anthrax outbreak in 1979revealed a novel missense mutation and five unique nucleotidechanges among ten victims. The authors concluded that thesedata indicate little or no horizontal transfer between differentB. anthracis strains. Question: Which types of nucleotide changes (missense or synonyms)cause amino acid changes?arrow_forward
Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage Learning