What structure does the interphase chromosome have? Why is it impossible to see through a microscope?

What structure does the interphase chromosome have? Why is it impossible to see through a microscope? What substances does the chromosome consist of?

Chromosomes in the interphase are stretched in the form of long thin filaments; they contain a large number of despiralized regions, which makes them practically invisible.
Chromatin is a substance of chromosomes – a complex of DNA, RNA and proteins.

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