what are genes . where are they located
Genes are simply short regions of DNA which code for either a protein or RNA molecule.
They are found in almost every cell's nucleus and are made from strands of DNA (deoxyribonucleic acid). Segments of DNA called "genes" are the ingredients. Each gene adds a specific protein to the recipe. Proteins build, regulate and maintain your body.
Genes are hereditary units located at chromosomes.
The point at which gene is located at chromosome is called locus.