During which three phases are individual chromosomes no longer visible

During which three phases are individual chromosomes no longer visible

Answer: 

You cannot observe individual chromosomes during the interphase's three phases: G1 phase, S phase, and G2 phase. Chromosomes during these phases exist as loose material known as chromatin and are neither compact nor discernible through a microscope. Chromosomes are condensed and become discernible only at prophase of the mitotic division. Therefore, you cannot observe chromosomes at all during interphase before the initiation of cell division.

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