Explanation: There is always an equal amount of chemical for their counterparts. For example, if A (the chemical) made up 20% of a DNA molecule, T would also make up 20%.
Genes are segments of deoxyribonucleic acid (DNA) that code for a specific protein that works in one or more types of cells in the body. Chromosomes are structures within cells that contain a person's genes. Genes are contained in chromosomes, which are found in the cell nucleus.