A mutation may change a trait that may be even helpful, such as enabling an organism to better adapt to its environment. It is a point mutation when one mucleotide base is interchanged for another in DNA sequence. which can lead to wrong amino acid to be produced. The sequence of letter in a gene determines the sequence of amino acids in the protein it encodes. A point mutation can change the amino acid sequence of the resultinf protein.
A mistake in the DNA is called missence mutation that can result in the wrong amino acid being incorporated into a protein because of this shift. It will result in a different amino acid codon which the ribosome remembers. Changes in amino acid is important in protein's function. When mutation occur the stop codon do not code for an amino acid and signal the end of protein synthesis.