Understanding Silent Mutations: The DNA Point Mutation that Doesn’t Alter Amino Acid Sequence.

DNA sequence (normal) – TAC GTA GTC ACC TAA TGG ATC Amino acid sequence – met his gln trp ile thr stop DNA sequence 2 – TAC GTA GTC AGC TAA TGG ATC amino acid sequence – met his gln ser ile thr stop what kind of mutation is sequence 2 and why?

The mutation in DNA sequence 2 is a point mutation called a silent mutation

The mutation in DNA sequence 2 is a point mutation called a silent mutation. In this particular case, the mutation occurs in the third codon position of the DNA sequence, where the original codon “ACC” (coding for threonine) is changed to “AGC” (also coding for the same amino acid, threonine).

Silent mutations are considered “silent” because they do not result in a change in the amino acid sequence. This is due to the degeneracy or redundancy of the genetic code. The genetic code is composed of codons, each consisting of three nucleotides, and each codon codes for a specific amino acid. However, multiple codons can code for the same amino acid, and this redundancy allows for mutations in the DNA sequence that do not alter the amino acid sequence or the corresponding protein’s function.

In this case, the silent mutation of the third codon position from “ACC” to “AGC” does not change the resulting amino acid, as both codons code for threonine. Therefore, this mutation is silent and has no effect on the amino acid sequence or the protein’s function.

More Answers: