How many DNA molecules does a cell with 4 chromosomes have in G1 phase?

In the G1 phase of the cell cycle, a cell is in a stage of growth and preparation for DNA synthesis, but it has not yet duplicated its DNA. Each chromosome consists of a single DNA molecule in this phase. Therefore, a cell with 4 chromosomes will contain 4 individual DNA molecules during G1.

As the cell prepares to enter the S phase, it will replicate its chromosomes, resulting in each chromosome being made up of two sister chromatids, leading to a total of 8 DNA molecules after the S phase. However, during G1, there is no replication; hence, the number of DNA molecules remains equivalent to the number of chromosomes present. Thus, the cell in G1 with 4 chromosomes will have 4 DNA molecules.