wgat are genes and whsre arw they located
Genes are found inside choromosomes Genes are located on chromosomes, which are organized structures of DNA and protein. Chromosomes are found in the nucleus of the cell. Actually, a gene itself is coded for by the base sequence (the adenine-thymine and cytosine-guanine sequence) of a DNA strand.
Genes are made up of DNA. Each chromosome contains many genes. A gene is the basic physical and functional unit of heredity. Genes, which are made up of DNA, act as instructions to make molecules called proteins. In humans, genes vary in size from a few hundred DNA bases to more than 2 million bases.