what are both chromosomes and genes made from?

Both chromosomes and genes are made from deoxyribonucleic acid (DNA). Chromosomes are thread-like structures inside the cell nucleus, composed of a long DNA molecule tightly coiled around proteins called histones that support their structure. Genes are segments of this DNA sequence that contain the instructions for building specific proteins. Thus, genes reside within chromosomes as particular stretches of DNA, encoding the genetic information necessary for protein synthesis and other cellular functions.