After a mutation at a genetic locus, the character of an organism changes due to a change in:

Explanation

After a mutation at a genetic locus, the character of an organism changes due to a change in protein structure. Mutations can occur in the DNA of an organism, which can lead to changes in the RNA that is transcribed from that DNA. This, in turn, can lead to changes in the proteins that are synthesised from that RNA. If the mutation occurs in a protein-coding region of the DNA, it can lead to a change in the amino acid sequence of the protein. This change in amino acid sequence can lead to a change in the protein's structure and function.The other options are incorrect because:DNA replication is the process of copying DNA. It is not directly involved in changing the character of an organism.The protein synthesis pattern is the way in which proteins are synthesised from RNA. It is not directly involved in changing the character of an organism.RNA transcription pattern is the way in which RNA is transcribed from DNA. It is not directly involved in changing the character of an organism.