Asequence of nucleotides found in the dna of a chromosome codes for a specific protein or trait. this section if dna is known as a?

codon

Explanation:

A codon is a sequence of three nucleotides that translates to a specific amino acid or stop signal during protein synthesis. There are 20 amino acids that make up proteins. There are 64 different codons and only 61 specify amino acids while the remaining three are used as stop signals.

b is the best answer for this question.