While studying the dna of organisms within a single species, erwin chargaff discovered that the amount of adenine is about equal to the amount of thymine. which of these explains why the ratio of adenine to thymine is nearly 1:1? (6a) question 5 options: adenine and thymine pair with each other. adenine binds with phosphates, while thymine binds with nitrates. adenine and thymine are identical in chemical composition adenine bases contain a form of thymine.