I got the question in my exam and wrote the following and I do not understand what is wrong in it:
Giemsa staining is a staining method to stain particularly malaria and other parasital diseases. G-bands occur because Giemsa stain consists of A,T rich material i.e. poor gene such that dark and white bands occur. Each chromosome has an unique reaction to Giemsa staining so G-bands occur.
0 points. I do not understand what's wrong with it, since in their comments about the same question in my first exam they wrote also the extra questions: What are G-bands? How are they formed and why? This time I answered the given things and got zero mark.
Probably, the mistake was that I did not answer to the question in the scope of medical Biology in some way. However, I am not exactly sure what it is exactly.
How would you answer to the question when you know that the course was about medical biology?
Please, add the tag Giemsa.