The term DNA-RELATED can be broken down into two crossword solutions: GENETIC (7 letters). DNA, or deoxyribonucleic acid, is a molecule that contains the GENETIC instructions used in the development and functioning of all known living organisms. It is made up of four nucleotides, which are the building blocks of DNA. GENETIC refers to the study of heredity and the variation of inherited characteristics. It is the branch of biology that studies how traits are passed from one generation to the next.