DNA

        DNA  a genetic code called deoxyribonucleic .  Every living thing is made up of DNA. Genes are chemical instructions sent from parents to child.  Genes are stored in chromosomes.  If gens were a really thin rope it would be over a thousand times longer than wide.  Genes which are made of DNA determines how you look. The four chemicals DNA is made up is adenine, thymine, cytosine and guanine.