Final answer:
Chromosomes are known as the colored stuff in DNA, and the word chromosome literally means "colored body." They are structures made of DNA and proteins and contain tens of thousands of genes.
Step-by-step explanation:
Chromosomes are known as the colored stuff in DNA and proteins. The word chromosome literally means "colored body." Chromosomes are structures made of DNA and proteins called histones. They contain tens of thousands of genes, which are units of genetic instructions for making proteins. Most genes contain the instructions for a single protein.