In case of type I or type-1 error, the null hypothesis is rejected though it is true whereas type II or type-2 error, the null hypothesis is not rejected even when the alternative hypothesis is true.

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#Unit 3. Fundamental Processes

Ames Test is used to measure carcinogenicity and mutagenicity of any chemical mutagen.

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#Unit 3. Fundamental Processes

The Ames test uses a strain of S. typhimurium that is mutant for the operon responsible for the biosynthesis of the amino acid histidine.

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#Unit 3. Fundamental Processes

A more potent mutagen translates into a greater number of revertant colonies.

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#Unit 3. Fundamental Processes

Reversal of the mutation can only be done by same mutagen which created forward mutation.

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#Unit 3. Fundamental Processes

The telomere is absolutely required for the stability of the chromosome end.

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#Unit 3. Fundamental Processes

The same type of telomeric sequence is found in plants and humans so conserved in nature.