A DNA segment has base order CCC ATA GCT. Which copy exhibits a deletion in the first codon triplet and then a substitution mutation?(1 point)
1 CCC TAG CT
2 CCA TAG CT
3 CCA ATA GCT
4 CCA TAA CT
The copy that exhibits a deletion in the first codon triplet and then a substitution mutation is:
4) CCA TAA CT