What type of mutation occurred in the following example?

Original DNA: CAT GAT
New DNA: CAT AT

In this example, a deletion mutation occurred, where the "G" nucleotide was removed from the original DNA sequence.

The type of mutation that occurred in this example is deletion mutation.

In this example, there is a deletion mutation, specifically the deletion of the nucleotide sequence "GAT" in the new DNA compared to the original DNA. A deletion mutation occurs when one or more nucleotides are removed from the DNA sequence. It can lead to a shift in the reading frame of the genetic code, potentially resulting in significant changes to the resulting protein.