A mutation has occurred! Either a mistake in replication, transcription, or translation, or mutagen caused a change in the genet
ic code. Substitute a cytosine (C) for a uracil (U), in the third base pair position of codon #2 (position #6). What will the new mRNA codon read after the mutation?
point mutation, change within a gene in which one base pair in the DNA sequence is altered. Point mutations are frequently the result of mistakes made during DNA replication, although modification of DNA, such as through exposure to X-rays or to ultraviolet radiation, also can induce point mutations