Spontaneous Mutations and Reversions - Research Article from World of Genetics

Robin Cook
This encyclopedia article consists of approximately 2 pages of information about Spontaneous Mutations and Reversions.
This section contains 414 words
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Spontaneous Mutations and Reversions

Mutations and reversions are events that change the expression of traits of an organism. They change the organism's phenotype. The change can result from a change in a base--a constituent of the deoxyribonucleic acid--or a change in one of the amino acid constituents of the ribonucleic acid that is used as a blueprint to make a protein.

Each time DNA replicates, mistakes can occur. If the mutation is deleterious, the organism does not survive. But, if the mutation changes the organism's phenotype in a nonlethal fashion, the mutation can persist. The accuracy of DNA replication, the occurrence of damage to the DNA, and the effectiveness of mechanisms for DNA repair determine the rate at which mutations occur. Bacteria and other organisms exhibit natural mutation and reversion rates, where mutations and reversions can occur spontaneously.

Salvador Luria and Max Delbrück provided...

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This section contains 414 words
(approx. 2 pages at 300 words per page)
Buy the Spontaneous Mutations and Reversions Encyclopedia Article
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Gale
Spontaneous Mutations and Reversions from Gale. ©2005-2006 Thomson Gale, a part of the Thomson Corporation. All rights reserved.
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