Answer:
Gene
Step-by-step explanation:
The gene is a segment of a DNA molecule (deoxyribonucleic acid), responsible for the genetically inherited characteristics. Each gene is made up of a specific DNA sequence that contains a code to produce a protein that performs a specific function in the body. Each human cell has about 25,000 genes.
Most genes are contained in chromosomes. The chromosome is made up of a long chain of DNA wrapped around a special protein called histone. Most chromosomes contain several different genes.