Question

What does a mutagen cause?

Answer 1

When experiments were performed to crack the genetic code it was found to be a code that was triplet. These three letter codes of nucleotides (AUG, AAA, etc.) are called codons. ... That means all organisms use the same codons to specify the placement of each of the 20 amino acids in protein formation

Answer 2

❀ $\large{ \underline\textbf{Answer - }}$

A mutagen is a substance that causes a mutation in the DNA.