Question

in this phase of interphase, the cell replicates its dna and at the end of this phase, the cell has two complete sets of chromosomes, what stage is this?

Explanation:

In the cell cycle, the S (Synthesis) phase is when DNA replication occurs. After this phase, the cell has two complete sets of chromosomes. G1 is the first gap phase for cell growth and preparation, and G2 is the second gap phase for further growth and checkpoints before mitosis. The description in the question ("the cell replicates its DNA and at the end of this phase, the cell has two complete sets of chromosomes") directly corresponds to the S phase.

Answer:

S phase