This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Techniques in molecular biology, Subject name: Biochemistry
[{'content': 'Banding technique most commonly employed for cytogenetic analysis \nSelect and explain. \nA. G banding, B. C banding, C. R banding, D. Q banding', 'role': 'user'}, {'content': 'Answer: A \nExplanation: G-banding (most common) R-banding Q-banding C-banding T-banding G stands for Giemsa R stands for "reverse" Q stands for Quinacrine Fluoroescent dye C stands for Constitutive heterochromatin or Centromere T stands for telomeres to produce a visible karyotype Dark regions are heterochromatin (AT) Light regions are Euchromatin (GC) Dark regions are euchromatin Bright regions are heterochromatin', 'role': 'assistant'}]