Question

which are segments of dna that code for specific traits?
genes
chromosomes
proteins
codons

Explanation:

Genes are specific DNA segments that carry the instructions for building and maintaining an organism, and code for specific traits. Chromosomes are structures that contain DNA and genes. Proteins are the products of gene - expression. Codons are sequences of three nucleotides in mRNA that correspond to specific amino acids during protein synthesis.

Answer:

A. genes