Use the Mutations interactive to determine which statements describe silent mutations. The adenine of the start codon is position +1.

1) a single nucleotide deletion at position +12 in the antisense strand
2) a C nucleotide insertion at position +2 in the sense strand
3) a substitution from G to T in the arginine codon of the antisense strand
4) a substitution of a G nucleotide at position +9 in the antisense strand
5) a transition at position +6 in the sense strand
6) a transversion of A in the histidine codon of the antisense strand