Final answer:
It is during the phase of Interphase where chromosomes are uncondensed and not distinguishable as individual structures, making it the correct answer despite it not being listed among the provided options.
Step-by-step explanation:
During which phase is it impossible to tell the individual chromosomes apart because they are uncondensed? The answer is not listed in the provided options, because chromosomes are indeed condensed and visible during all the phases mentioned (Prophase, Metaphase, Anaphase, Telophase).
However, the phase of the cell cycle where individual chromosomes are uncondensed and indistinguishable is called Interphase, specifically during the G1, S, and G2 phases. During Interphase, chromosomes are in the form of chromatin, a less condensed structure allowing for gene expression and DNA replication.