During an Ames test, bacteria were exposed to a potential mutagen.Also, as a control, another sample of bacteria was not exposedto the mutagen. In both cases, 10 million bacteria were plated andthe following results were obtained:No mutagen: 17 coloniesWith mutagen: 2017 coloniesCalculate the mutation rate in the presence and absence of the mutagen.How much does the mutagen increase the rate of mutation?
Genetic Recombination
Recombination is crucial to this process because it allows genes to be reassorted into diverse combinations. Genetic recombination is the process of combining genetic components from two different origins into a single unit. In prokaryotes, genetic recombination takes place by the unilateral transfer of deoxyribonucleic acid. It includes transduction, transformation, and conjugation. The genetic exchange occurring between homologous deoxyribonucleic acid sequences (DNA) from two different sources is termed general recombination. For this to happen, an identical sequence of the two recombining molecules is required. The process of genetic exchange which occurs in eukaryotes during sexual reproduction such as meiosis is an example of this type of genetic recombination.
Microbial Genetics
Genes are the functional units of heredity. They transfer characteristic information from parents to the offspring.
During an Ames test, bacteria were exposed to a potential mutagen.
Also, as a control, another sample of bacteria was not exposed
to the mutagen. In both cases, 10 million bacteria were plated and
the following results were obtained:
No mutagen: 17 colonies
With mutagen: 2017 colonies
Calculate the mutation rate in the presence and absence of the mutagen.
How much does the mutagen increase the rate of mutation?
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