The Molecular Basis of Inheritance

Based on Example Problem 1, if a sample of DNA contains 30% Thymine (T), then it also contains 30% Adenine (A) due to Chargaff's rules where A = T. This means A + T = 30% + 30% = 60%. The remaining percentage for Guanine (G) and Cytosine (C) would be 100%−60%=40%100\% - 60\% = 40\%. Since G = C, then Guanine (G) would be 40%÷2=20%40\% \div 2 = 20\%.