A mutation took place in this starting DNA nucleotide sequence. $CTAGAATCCTCTCCC$ Once the mutation had occurred, the altered DNA nucleotide sequence coded for the amino acids Asp, Leu, Gly and Glu. The table gives the amino acids coded for by each DNA triplet. Which type of gene mutation took place in the DNA nucleotide sequence?
- Adeletion of one nucleotide
- Binsertion of one nucleotide
- Cinsertion of two nucleotides
- Dsubstitution of one nucleotide