A genetic mutation that causes a codon that should code for a specific amino acid to be changed into a stop codon results in a shortened protein product and is known as

Nonsense Mutation

Explanation:

Mutations are changes in a cell's DNA sequence. When a mutation happens in the coding sequence of a gene, the resulting protein is changed A nonsense mutation is a point mutation that introduces a premature stop codon into the part of the gene that encodes a protein. A stop codon is like a period at the end of a sentence. It instructs the ribosome to stop making the protein.Half-baked proteins that result from nonsense mutations are often nonfunctional or defective.  The DNA sequence of the coding region of a gene is transcribed into a messenger RNA molecule, whose sequence is in turn read and decoded by the ribosome and transfers RNAs during translation. The sequence of a messenger RNA is read in groups of three nucleotides called codons. Each possible combination of the three RNA nucleotides (A, G, C and U) codes for an amino acid, translation start or translation stop. What you're looking at on screen is a table that shows what each codon means to the ribosome and transfer RNAs.