Cells carry the instructions for all of their necessary tasks in their chromosomes. Chromosomes within a cell are made up of very long molecules called deoxyribonucleic acid (DNA). Genes, the basic units of heredity for all living things, areanbsp;...
|Title||:||Notable Scientists from 1900 to the Present: D-H|
|Publisher||:||Gale Cengage - 2001-01-01|