AP BIOLOGY

Detailed explanation-1: -Silent mutations are mutations in DNA that do not have an observable effect on the organism’s phenotype. They are a specific type of neutral mutation.

Detailed explanation-2: -The majority of mutations have neither negative nor positive effects on the organism in which they occur. These mutations are called neutral mutations. Examples include silent point mutations. They are neutral because they do not change the a mino acid s in the proteins they encode.

Detailed explanation-3: -change a codon to one that encodes the same amino acid and causes no change in the protein produced. These are called silent mutations.

Detailed explanation-4: -Non-lethal mutations occur both in acinar and ductal cells exposed to mutagens or carcinogens. The induction of DNA damage in these cells by carcinogens has been documented in hamsters and rats. The -oxidized di-n-propylnitrosamines activated to form mutagens by pancreatic microsomal cell fractions are an example.