Genes

Genes are units of heredity found in living organisms, composed of DNA. They act as instructions for building and maintaining cells, influencing traits like eye color, height, and susceptibility to certain diseases. Each gene is located at a specific position on a chromosome, and humans have about 20,000 to 25,000 genes. These genetic instructions are passed from parents to offspring, shaping biological characteristics. Environmental factors also interact with genes, affecting how traits are expressed. Understanding genes helps in fields like medicine and biology, aiding in the study of genetics, evolution, and health.