A. Acceptable variations in the ‘normal’ DNA and protein sequences B. The exchange of DNA between chromosomes during meiosis. C. The movement of a ribosome from one reading frame to another at an internal position within a gene D. A DNA repair process that corrects various types of DNA damage by excising and resynthesizing a region of polynucleotide E. Permanent, heritable alterations in the base sequence of the DNA.
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A. LuciusSenior Content writer, Diploma in Literature, Dover, Delaware
Senior Content writer, Diploma in Literature, Dover, Delaware
Answered on Nov 01, 2019
The correct answer is option E – Permanent, heritable alterations in the base sequence of the DNA. A mutation refers to changes or alterations of the base-pair sequence in genetic material. These alterations are permanent and cannot be corrected. Mutation can be inherited or acquired as a result of environmental factors such as smoking and sunlight.
There are three types of mutations – silent, missense, and nonsense mutation. If the amino acid produced is different from the initial amino acid at the site of the change, a nonsense mutation or missense mutation has occurred. This will affect the function and structure of the protein produced. This mutation also causes premature signals to stop making protein resulting in a shortened protein that will not function properly.