Genes are the basic physical and functional unit of heredity. They are made up of DNA and are found in the chromosomes of every cell in the body. Genes carry the information that determines an individual's traits, such as physical characteristics and other biological functions. Most genes code for specific proteins, which have various functions within the body. Humans have approximately 20,000 to 25,000 genes, and every person has two copies of each gene, one inherited from each parent
. Genes play a crucial role in determining how we look and function, and they are passed from parents to offspring, influencing inherited traits
