Question

What's a codon

Answer 1

What's a codon

Answer 2

a codon is sequence in the DNA that instructs witch and when certain genes are activated

Answer 3

realsofia's right.

Do you know what NUCLEO BASES are?

DNA has four different nucleo bases:

Adenine (A)
Thymine (T)
Guanine (G)
Cytosine (C)

A CODON is a group of THREE nucleobases.

Let me throw out some examples of codons:

(A A T)

(T T C)

(G G A)

(C C A)

You see?
A CODON is just a group of ANY THREE nucleobases.